noun or participle which takes 'suru', intransitive verb, noun, na-adjective
be stumped; be at a loss; be nonplussed
Describes being so perplexed or overwhelmed that one is rendered speechless or unable to respond. Often used when facing an unexpected difficulty or an unreasonable situation.
彼の理不尽な要求には閉口した。
I was at a loss for words at his unreasonable demand.
あまりの暑さに閉口している。
I'm stumped by the extreme heat.
noun or participle which takes 'suru', intransitive verb, noun, na-adjective
be fed up; be annoyed; be unable to bear
Expresses irritation or weariness with a persistent or unpleasant situation. Often used with に or には to mark the cause of annoyance.
毎日の満員電車には本当に閉口する。
I'm really fed up with the crowded train every day.
彼の自慢話には閉口した。
I got annoyed with his boasting.