うつむく
うつむく · utsumuku · JLPT N1 · verb-godan
to look downward
👇 Etymology: うつ (prone, face-down) + むく (to face) = face downward
Also written 俯く. The first part うつ means prone or face-down, and the second part むく means to face toward. Together they describe a head tilted down, as in shame or deep thought.