The qiǎo reading is the literary single-character word for 'silent' and, by extension, 'sorrowful'. It survives mainly in set expressions: 悄然 (quietly; sadly), 悄声 (in a hushed voice), 悄无声息 (without the faintest sound). Everyday speech uses the doubled qiāo form 悄悄 instead.
Left heart radical, three quick strokes, the side form of 心. It marks 悄 as an inner state rather than a literal silence: a hushed, downcast mood. Same family: 情 feeling, 怕 afraid, 惜 to value.
Right 肖 supplies the sound, xiào shifting to qiāo through a well-attested initial drift. 肖 carries a faint 'small, diminished' flavour (compare 削 to shave thin, 销 to dissolve), reinforcing the muted, scaled-down quality of being quiet.
