缺
ケツ, ケン, か.ける, か.く

lack, gap, fail

JLPT0 G13 S0 F5000

As per 夬# (scoop out) + 缶 bulging earthenware jug/vase → hole scooped into earthenware to create a container. For other meanings, see 欠.

[Full Kanji Etymology List]