זמזם to hum, to buzz.
— Pilp. - זִמְזֵם he hummed, he buzzed. [An imitative word coined by Eliezer ben Yehudah on the analogy of Arab. zamzama (= he murmured). cp. זַמְזֻמִּים, name of a people of giants (see Deut. 2:20); prob. meaning lit. ‘whisperers, mumblers’.] Derivatives: זַמְזוּמִית, זַמְזָם, זַמְזֵמָה, זַמְזְמָן.