PS

*ˁmḳ - to be deep (CDG 63)

Semantically unambiguous cognates to this root are missing from both Akkadian and MSA. Cf. Akk. emēḳu ‘to be wise’ and MSA *ˁamḳ- ‘midst, interior’.

Proto-MSA
*ˁamḳ- - middle (Kogan 2015: 549)
M. Bittner (1909:14, 1915b:8) and W. Leslau are undoubtedly correct to derive it from PS *ˁmḳ ‘to be deep’ (CDG 63), notwithstanding a somewhat peculiar semantic development

Ugaritic
ˁmḳ - valley (DUL 165)
Hebrew
ˁmḳ - to be deep (HALOT 947)
Syriac
ˁmḳ - to become deep; to be sunk down (LSyr. 531, SL 1113)
Arabic
ˁmq - to be deep (Lane 2157)
Geez
ˁamaḳa - to be deep (CDG 63)