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to open (e.g. one's robe); to bare (e.g. one's chest); to expose
to open up (of clothing); to be exposed
走ったらシャツが肌蹴った。
My shirt came open when I ran.
暑くて胸元を肌蹴ている。
It's hot and my chest is exposed.
風で着物が肌蹴そうになって慌てた。
The wind nearly opened my kimono and I panicked.