Words

Tigrinya
ˁaṭärä - to be wrinkled (skin of the face) (TED 1936)

Perhaps cf. PS *ˀṭr ‘to take away, to deprive someone (of a physical facility)’ 

Amharic
əbab - snake, serpent (AED 1198, Guidi 453–454)
Amharic
əbbät - fresh bovine dung (AED 1201)
Amharic
əbd - mad, crazy, lunatic, insane (AED 1204, Ludolf 59)
Amharic
abbäḳä - to be covered with whitish scales (one afflicted by leprosy or scurf) (AED 1197)
Amharic
abbat - father (AED 1199)
Amharic
abbäṭä - to swell (AED 1205)
Amharic
-aččäw - their; them (genitive and accusative pronominal suffix, 3 pl.) (Bulakh–Kogan 2013b:101)
The possessive suffix is extended by the plural marker -ač. It is uncertain whether -äw a the reflex of *-omu with non-trivial phonological development or it should be related to the 3 masc. sg. marker -(ə)w (Bulakh–Kogan 2013b:103).
Amharic
-ačhu - your; you (genitive and accusative pronominal suffix, 2 pl.) (Bulakh–Kogan 2013b:101)
The possessive suffix is extended by the plural marker -ač (Bulakh–Kogan 2013b:103).
Amharic
-aččən - our (genitive pronominal suffix, 1 pl.) (Bulakh–Kogan 2013b:101)
The possessive suffix is extended by the plural marker -ač (Bulakh–Kogan 2013b:103).