1
to hum (a tune);to sing to oneself;to croon
母は台所でせっせと料理しながら歌を口ずさんでいた。
Mother hummed to herself as she went about her cooking in the kitchen.
Other forms
口遊む 【くちずさむ】 (rarely used kanji form) · 口吟む 【くちずさむ】 (rarely used kanji form)