Dated term for the calf; modern Japanese normally uses ふくらはぎ. Still understood, but sounds old-fashioned.
See also: ふくらはぎ
I got a cramp in my calf.
People in the past called the calf 'komura'.
Rare kanji form; also read こぶら. The reading こぶら is archaic and restricted to this kanji.
Very rare kanji form; it is rarely used.
The origin is uncertain; possibly related to こぶ (lump) and むら (village/group), but this is speculative. The word is native Japanese.