Klein Dictionary, חמה 1

חמה to see, protect. [Base of חוֹמָה. Arab. ḥama (= he protected), OSArab. חמי (= to protect), Aram. חֲמָא, חֲמִי (= he saw, observed). For sense development cp. שׁוּר ᴵ (= wall), which prob. derives from שׁוּר (= to behold, regard, look at).]