Zway

ḳorra - frost of morning (EDG 495)

Kogan 2015:38: “tentatively considered a loanword from Oromo by Leslau.”

PWS

*ḳrr - cold (Fronzaroli 1965a: 142, 147, 150; Kogan 2011: 195; Kogan 2015: 38, HALOT 1127, 1149, CDG 443)

For a close semantic parallel outside this root cf. Akk. kaṣâtu ‘morning coolness, morning’ (CAD K 263, AHw. 458) < kaṣû ‘to be cold.’