a spinning top / (by extension) a rigid object that can rotate freely around a fixed point / a 家紋 (kamon, “family crest”) in the form or shape of a spinning top

aquamarine (the color or the gemstone)

to use one's head

use one thing for many purposes / work someone hard

(archaic, colloquial) a nickname of Ariwara no Narihira, Heian-period waka poet

just as in the old days, just as it used to be

駒鶇: an American robin

駒を進める: (idiomatic) advance

(music) koma-gaku, music of Goguryeo Korean origin in the gagaku repertoire

Alternative form of こましゃくれる