| 163068 | Kyenele (Miyak Dialect) | maʌľɩŋ | | | Davies and Comrie (1985) | mouth |
| 76208 | Lavukaleve | leu | mouth | | Tryon & Hackman (1983) | |
| 163066 | Lembena | ambulu | | | Davies and Comrie (1985) | mouth |
| 163067 | Lembena (Maibi Dialect) | ŋga'βɷŋk‘ | | | Davies and Comrie (1985) | mouth |
| 163076 | Lembena (Yariba Dialect) | am'bur̥ | | | Davies and Comrie (1985) | mouth |
| 176691 | Lemio | cɨgosʌk | | | Z'graggen (1980) | mouth |
| 155488 | Madi | ma | | | McElhanon and Voorhoeve (1970) | mouth |
| 257025 | Magɨ | sɨmbɨkatam | | | Daniels (2016) | |
| 139700 | Maia (Pila Dialect) | -kamnoar | | | Z'graggen (1980) | (mouth) |
| 139701 | Maia (Saki Dialect) | -simaŋ | | | Z'graggen (1980) | (mouth) |
| 75270 | Mailu | noga | | | Saville (1912) | |
| 86055 | Mailu (Asiaoro Dialect) | noga | | | Thomson (1975) | |
| 87425 | Mailu (Baibara Dialect) | noga | | | Thomson (1975) | |
| 86877 | Mailu (Borebo Dialect) | noga | | | Thomson (1975) | |
| 88247 | Mailu (Darava Dialect) | noga | | | Thomson (1975) | |
| 87973 | Mailu (Delebai Dialect) | noga | | | Thomson (1975) | |
| 87151 | Mailu (Domara Dialect) | noga | | | Thomson (1975) | |
| 87699 | Mailu (Geagea Dialect) | noga | | | Thomson (1975) | |
| 86329 | Mailu (Ilai Dialect) | noga | | | Thomson (1975) | |
| 86603 | Mailu (Island Dialect) | noga | | | Thomson (1975) | |
| 217787 | Maiwa | noiwa | Daga - nowa | | SIL (1967) | |
| 221190 | Maiwa | 'non.wa | | | SIL (1973) | |
| 36281 | Makasae | n'ubukai | | | Stokhof (1975) | |
| 139699 | Mala | bar | | | Z'graggen (1980) | (mouth) |
| 139695 | Malas | kambar | | | Z'graggen (1980) | (mouth) |
| 176708 | Male | mob | | | Z'graggen (1980) | mouth |
| 176709 | Male | moijubo | | | Z'graggen (1980) | mouth |
| 233100 | Mali (Arambum Dialect) | ƀʌmgi | | | SIL (1985) | |
| 233202 | Mali (Makunga Dialect) | amki | | | SIL (1985) | |
| 155515 | Mamaa | donɨ | | | McElhanon and Voorhoeve (1970) | mouth |
| 155520 | Ma Manda | mɛ | | | McElhanon and Voorhoeve (1970) | mouth |
| 155458 | Mandobo Atas | maŋgot | | | McElhanon and Voorhoeve (1970) | mouth |
| 201373 | Mandobo Atas | mɑgot | | | Voorhoeve (2000) | |
| 201455 | Mandobo Atas (Yonggom Dialect) | mɑgot | | | Voorhoeve (2000) | |
| 29507 | Manem | mosof | | | Voorhoeve (1971) | |
| 155544 | Mape (East Dialect) | mau | probable Aŋ. loans | | McElhanon and Voorhoeve (1970) | mouth |
| 155543 | Mape (West Dialect) | mau | probable Aŋ. loans | | McElhanon and Voorhoeve (1970) | mouth |
| 257664 | Maria (Maiagolo Dialect) | uˈena | | | Dutton (1970) | mouth |
| 257666 | Maria (Maranomu Dialect) | uˈena | | | Dutton (1970) | mouth |
| 257668 | Maria (Uderi Dialect) | uˈena | | | Dutton (1970) | mouth |
| 257671 | Maria | uˈena | | | Dutton (1970) | mouth |
| 155483 | Marind (Gawir Dialect) | bake | | | McElhanon and Voorhoeve (1970) | mouth |
| 120366 | Matepi | ove- | | | Z'graggen (1980) | mouth |
| 139703 | Mauwake | opamaka | | | Z'graggen (1980) | (mouth) |
| 139707 | Mawak | apar(amun) | | | Z'graggen (1980) | (mouth) |
| 120364 | Mawan | owa- | | | Z'graggen (1980) | mouth |
| 77798 | Maybrat | -asoh | | | Dol (2007) | |
| 77013 | Mbaniata | ā | mouth | | Tryon & Hackman (1983) | |
| 76718 | Mbaniata (Lokuru Dialect) | ā | mouth | | Tryon & Hackman (1983) | |
| 76644 | Mbilua | sutɔ | mouth | | Tryon & Hackman (1983) | |
