shun
Suddenly losing all energy and becoming quiet after a disappointment. Like a balloon slowly losing air.
💡A dog being scolded — 'The puppy went shun and lay down quietly.'
怒られて犬がしゅんとなった。
Being scolded, the dog went shun and looked sad.
When I raised my voice, the child went ___ and stopped talking.
声を上げたら子供が○○となって黙ってしまった。