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]