駒
ク, こま

pony, horse, colt

JLPT1 G7 S15 F1452

As per 句# (bend) + 馬 horse → *colt* (← bending figure of a foal on unsteady legs; compare 狗) → (general term for a) *horse*. Also via the idea of demarcating a narrow space is *bridge* (of a stringed instrument) and *shogi/chess pieces*. The latter meaning is influenced by the Chinese term 馬子.

[Full Kanji Etymology List]