欠陥
けっかん · kekkan · JLPT N3 · noun
defect
🕳️ 欠 lack + 陥 cave-in = a flaw; kekkan sounds like cracked can
欠 means missing or lacking, as in 欠席 (absence). 陥 means to fall in or collapse, as in 陥没 (cave-in). Something missing that makes the whole thing give way is a defect, and a cracked can is a product with exactly that kind of fault.
欠 — person 人 below + open mouth 欠 top (yawning figure)
Pictograph of a person kneeling with mouth wide open, exhaling — originally depicting a yawn or breath. From this came meanings like 'to lack' or 'to owe', as if something is missing or breathed out. It now serves as a radical in characters related to breathing, singing, or desire (歌, 歡, 欲).