kochi-kochi
Completely stiff and hard, whether from freezing cold, extreme nervousness, or something drying out. Describes both physical and emotional rigidity.
💡Before a big presentation — 'I was so nervous my shoulders were kochi-kochi.'
緊張で体がこちこちに固まった。
My body went kochi-kochi stiff from nervousness.
After sitting in the cold, my fingers were ___.
寒い中座っていたら、指が○○に固まった。