PS

*rḳḳ - to be thin

Akkadian
raḳāḳu - to become thin (CAD R 167, AHw. 957)
Ebla
ra-gu /raḳḳu/ - thin (VE 76, Kogan–Krebernik 2021b: 696)
Ugaritic
rḳ - fine, thin (DUL 733)
Hebrew
raḳḳā - thinness (HALOT 1288)
Arabic
rqq - to be thin (BK 1 902, Lane 1129)
Geez
ˀarḳaḳa - to make thin (CDG 473)
Tigre
räḳḳa - to be thin (WTS 151)
Tigrinya
räḳ̌äḳ̌ä - to be thin (TED 560)
Amharic
räḳḳäḳä - to be minute, very small, fine (AED 387)