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| Malta (f)  | Mörtel (m)  | Mortar / Grout | Mortier (m) | Mortero (m) / Argamasa (f)  | Argamassa (f)  | 
| Malta di gesso (f) / Stucco (m) | Gipsmörtel (m) / Gipsputz (m)  | Plaster / Gypsum mortar | Mortier de gypse (m)  | Mortero de yeso (m) / Enlucido de yeso (m) |  | 
| Maniglia a leva | Hebelgriff (m) | Lever handle / Lever grip | Poignée de béquille (f) | Mando de palanca (m) |  | 
| Maniglia della finestra | Fenstergriff (m) | Window handle | Poignée de fenêtre (f) | Manilla de ventana (f) |  | 
| Manometro (m)  | Manometer (nt) / Druckmessgerät (nt)  | Pressure gauge / Manometer | Manomètre (m)  | Manómetro (m) / Medidor de presión (m) | Medidor de pressão (m) / Manómetro (m)  | 
| Mansarda tetto (m)  | Mansarddach (nt)  | Mansard roof | Toit mansardé (m)  | Techo de la mansarda (m) / Buhardilla (f) | Telhado de mansarda (m)  | 
| Mantenimento (m) / Manutenzione (f)  | Instandhaltung (f) / Instandhalten (nt)  | Maintenance and repair  / Maintenance and service / Maintenance / Servicing | Maintenance (f) / Entretien (m)  | Mantenimiento (m) / Mantenimiento y reparación (m)  |  | 
| Marciume del legno / Carie di legno  | Holzfäule (f)  | Dry rot / Wood rot | Pourriture du bois (f) / Pourriture des boiseries (f)  | Pudrición seca (f) / Putrefacción de la madera (f)  |  | 
| Marmo (m) | Marmor (m)  | Marble | Marbre (m)  | Mármol (m)  | Mármore (m) | 
| Martello (m)  | Hammer (m)  | Hammer  | Marteau (m)  | Martillo (m)  |  | 
| Martello a pinna (m)  | Finnhammer (m) | Fin hammer | Marteau à ailettes (m) | Martillo de aleta (m) |  | 
| Martello da club (m) / Mazzuolo (m) | Fäustel (m)  | Mallet / Club hammer / Stonemason's hammer | Marteau club (m) /  Maillet (m) | Martillo de maza (m) / Mazo (m) |  | 
| Martello di gomma | Gummihammer (m)   | Rubber mallet  | Maillet en caoutchouc (m)  | Mazo de caucho (m)  |  | 
| Martello perforatore (m)  | Bohrhammer (m)  | Rotary hammer / Hammer drill | Marteau perforateur (m)  | Martilla Perforador (m)  |  | 
| Martello pneumatico (m)  | Drucklufthammer (m)  | Pneumatic hammer / Jackhammer | Marteau-piqueuer (m)  | Martillo neumático (m)  |  | 
| Maschera antigaz (f)  | Gasmaske (f)  | Gas mask  | Masque antigaz (m)  | Máscara de gas (f)  |  | 
| Mascherine antismog (f)  | Atemschutzmaske (f)  | Dust mask  | Masque respiratoire (m) | Mascarilla de protección (f)  |  | 
| Massa atomica (f)  | Atommasse (f)  | Atomic mass  | Masse atomique (f)  | Masa atómica (f)  |  | 
| Materiale pericoloso / Sostanza pericolosa (f)  | Gefahrstoff (m)  | Hazardous material / Hazardous substance | Substance dangereuse (f) / Matière dangereuse (f) | Sustancia peligrosa (f) |  | 
| Matita (f)  | Bleistift (m)  | Pencil  | Crayon (m)  | Lápiz (f)  |  | 
| Matrice (f)  | Matrize (f)  | Die / Matrix / Template / Stencil / Mould | Matrice (f)  | Matriz (f) / Molde (m)  | Matriz (f) / Molde (m)  | 
| Mattone argilloso  | Lehmziegel (m) | Adobe / Clay brick | Brique d'argile (f) / Brique en terre cuite (f)  | Adobe (m) / Ladrillo cerámico (m)  | Tijolo de argila (m)  | 
| Mattone di vetro | Glasbaustein (m) | Glass brick / Glass block | Brique de verre (f) / Bloc de verre (m) | Ladrillo de vidrio (m) / Bloque de vidrio (m) |  | 
| Mattonella (f) / Piastrella (f)  | Fliese (f)  | Tile | Carreau (m) / Dalle (f) | Baldosa (f) / Azulejo (m) |  | 
| Mazzuolo (m) / Maglio (m)  | Knüpfel (m) / Klipfel (m) / Klüpfel (m) / Klöpfel (m) | Mallet | Maillet (m) / Marteau (m) / Mailloche (f)  | Mazo (m) / Martillo (m)  |  | 
| Mazzuolo (m) / Mazzuolo di legno (m) | Holzhammer (m)  | Mallet / Wooden mallet | Maillet (m) | Mazo (m) / Mazo de madera |  | 
| Meccanismo di piegatura (m) | Faltwerk (nt)  | Folded plate/ Folded structure | Mécanisme de pliage (m) | Mecanismo de plegado (m) |  | 
| Mela  | Apfel (m)  | Apple | Pomme (f) | Manzana (f)  |  | 
| Membro (a quattro colonne) | Glied (vier/zweisäuliges) (nt)  | Element/Bar (four/two-column) | Élément (à quatre colonnes) (m) | Miembro (de cuatro columnas) (m)  |  | 
| Mensola (f)  | Konsole (f) / Kragstein (m)  | Corbel | corbeau (m)  | Ménsula (f) |  | 
| Mescolanza additiva (f)  | additive Farbmischung (f)  | Additive colour mixture  | Synthése additive (f)  | Mezcla aditiva de color (f)  |  | 
| Metalli alcalini (m, pl) | Alkalimetalle (nt, pl) | Alkali metals  | Métaux alcalins (m, pl) | Metales alcalinos (m, pl)  |  | 
| Metalli alcalino terrosi (m.pl)  | Erdalkalien (f.pl) / Erdalkalimetalle (nt.pl)  | Alkaline earth metals (pl)  | Métaux alcalino-terreux (m.pl)  | Metales alcalinotérreos (m.pl)  |  | 
| Metallo (m)  | Metall (nt)  | Metal | Métal (m)  | Metal (m)  | Metal (m)  | 
| Metallo nobile (m)  | Edelmetall (nt)  | Precious metal (Noble metal)  | Métal précieux (m)  | Metales preciosos (m.pl)  |  | 
| Metopa (f) | Metope (f) | Metope | Métope (f)  | Métopa (f)  | Metope | 
| Metro pieghevole (m) / Regola scorrevole | Gleidermassstab (m) / Zollstock (m) / Meterstab (m) | Folding yardstick / Folding ruler | Métre pliant (m) / Règle glissante (f)  | Metro plegable (m) / Regla deslizante (f) |  | 
| Metà (f)  | Hälfte (f)  | Half | Moitié (f)  | Mitad (f) |  | 
| Metà giro d'angolo con doppia coda di rondine (m)  | Klemmblatt (nt) / Druckblatt (nt) / Französisches Blatt (nt)  | Bevel lap joint / Corner half lap joint with double dovetail | Demi-joint d'angle avec double queue d'aronde (m)  | Articulación angular de media vuelta con doble cola de milano (f)  |  | 
| Mezza tetto barile | Halbtonnendach (nt)  | Half barrel roof | Toit en demi-cylindre (m) / Demi toit de baril (m) | Techo de medio cañón (m) Techo de media tonelada (m)  |  | 
| Mezzanino (m)  | Hochparterre (nt)  | Mezzanine floor | Mezzanine (f)  | Entresuelo (m) |  | 
| Mezzo di fumigazione (m)  | Begasungsmittel (nt)  | Fumigant  | Agent de fumigation (m)  | Agente de fumigación (m)  |  | 
| Microscopio biocolare (m)  | Binokularmikroskop (nt) | Binocular microscope  | Microscope binoculaire (m)  | Microscopio binocular (m)  |  | 
| Minerale metallico (m) | Erz (nt)  | Ore / Metal ore | Minerai (m)  | Mena (f) |  | 
| Miniescavatore (m)  | Bagger (Mini) (m)  | Mini-excavator  | Mini-pelle mécanique (f)  | Miniexcavadora (f)  |  | 
| Misurazione di construzione (m)  | Aufmaß (n)  | Measurement (of construction)  | Métré (m)  | Mediciòn (f) |  | 
| Mitra con perno (f)  | Gehrung mit Zapfen (f)  | Mitre bridle joint / Mitre joint with pin | Coupe d'onglet avec goupille (f)  | A inglete con perno (m)  |  | 
| Mobile (m)  | Möbel (nt.pl) / Mobiliar  | Furniture  | Meuble (m) / Meubles (m.pl) / Mobiliers (m.pl)  | Mueble (m) / Muebles (m.pl) / Mobiliario (m)  | Móvel (m) / Móveis (m.pl) / Mobiliário (m) / Mobília (f)  | 
| Modellare | Abformen (v) | Mould | Mouler | Modelar |  | 
| Modifica (f) | Änderung (f) | Modification  | Modification (f) | Modificatión (f) |  | 
| Modinature e tracciamenti provvisori (pl.) | Bauvisier (nt) / Provisorische Baugespanne (pl.)  | Provisional building profiles/markers  | Gabarits provioires (pl.) |  |  | 
| Modo di apprendere (m) | Hängung (f)  | Hanging (of pictures)  | Accrochage (m) | Suspensión (m)  |  | 
| Mogano (m)  | Mahagoni (nt)  | Mahogany | Acajou (m)  | Caoba (f)  | Mogno (m)  | 
| Monossido di carbonio (m) | Kohlenmonoxid (nt) / Kohlenstoffmonoxid (nt) | Carbon monoxide | Monoxyde de carbone (m) | Monóxido de carbono (m) |  | 
| Montante (m)  | Pfost (m)  | Post / Upright  | Montant (m) | Montante (m) |  | 
| Monumento (m)  | Denkmal (nt)  | Monument  | Monument (m)  | Monumento (m)  |  | 
| Mordente (m)  | Anlegeöl (nt)  | Gilding oil / Gold size | Mixtion (f)  | Mixtión (m)  |  | 
| Mordente (m)  | Beize (f) / Beizenfarbstoff (m)  | Stain  | Teinture (f)  | Mordente (m) / Colorante que requiere mordente (f)  |  | 
| Mordente per legno (m)  | Holzbeize (f) / Beizen (nt)  | Wood stain / Stain  | Lasure (f) / Teinture pour bois (f)  | Acabado de madera (m) / Tinte para madera (m) |  | 
| Moresca (f)  | Maureske (f)  | Moorish pattern / Moresque  | Mauresque (f)  | Morisco (m)  | Mauresco (m)  | 
| Morsetto a nastro carico (m)  | Kloben Ladenband (nt)  | Locking clamp for shutter hinge | Collier de serrage (m)  | Abrazadera de banda cargada (f)  |  | 
| Mortasico e tenone sciolto e giunto a tenone (m)  | Zapfenschloss (nt)  | Loose-wedged mortise and tenon joint | Mortaise et tenon à arêtes lâches (f)  | Unión de espiga y mortaja de cuña suelta (f)  |  | 
| Mostra (f)  | Ausstellung (f)  | Exhibition  | Exposition (f)  | Exposición (f)  |  | 
| Mucleo del castello  (m) / Core castello (m)  | Kernburg (f) / Hauptburg (f) / Hochburg (f) / innere Burg (f)  | Inner bailey / Inner ward | Château central (m) / Château principal (m)  | Castillo central (m)  |  | 
| Muratura (f)  | Mauerwerk (nt)  | Masonry / Brickwork | Maçonnerie (f) / Murs (m.pl) / Briquetage (m)  | Albañilería (f)  |  | 
| Muro circolare | Ringmauer (f)  | Curtain wall | Mur circulaire (m) | Muro cortina (m) |  | 
| Museo (m) | Museum (nt)  | Museum | Musée (m) / Muséum (m)  | Museo (m)  | Museu (m)  | 
| Mutulus | Mutulus (m)  | Mutulus | Mutulus | Múltulo (m) | Mutulus | 
| m) , Betulla (Legno di betulla | Birke (f) / Birkenholz (nt)  | Birch  | Bouleau (m) (Bois de bouleau, m)  | Abedul (m) (Madera de abedul, f)  |  | 
| malsano | gesundheitsschädlich (adj) | harmful / harmful to health / noxious | nocif / nuisible  | nocivo / peligroso  |  | 
| maniglia della porta | Türklinke | doorknob | Poignée de porte | picaporte 	 |  | 
| martellare | hämmern (v)  | hammer | marteler | martillar |  | 
| massicciamente (adj) / massiccio (adj)  | massiv (adj)  | solid (adj) / massive (adj)  | massif (adj) | macizo (adj) | maciço (adj) / sólido (adj) | 
| mattone | Backstein | (red) brick | brique f. | ladrillo |  | 
| mazza / martello di legno | Schlägel | mallet / sledgehammer | maillet | mazo |  | 
| merlo m. | Zinne | battlement | créneau m. | almena |  | 
| metallo (m), Davanzale | Fensterbank, Metall (f) | Windowsill, metal | Appui de fenêtre en métal (m) | Alféizar metálico (m) |  | 
| mettere a mollo/bagno  | einweichen (v) | soak  | tremper  | remojar |  | 
| miscelare | beimischen (v)  | add / mix | ajouter  | añadir |  | 
| mobile, Rotaia di guida | Führungsschiene, beweglich (f) | Guide rail, movable | Rail de guidage, mobile | Carril guía, móvil (m) |  | 
| modificare | ändern (etwas) (v) | modify | modifier  | modificar |  | 
| montare  | aufstellen (v)  | put up / set up  | installar  | colocar  |  |