adverb
whether one likes it or not; without choice; willy-nilly
Expresses that something happens regardless of one's will; often used when a situation forces an outcome.
否応なくその仕事を引き受けさせられた。
I was forced to take on that job whether I liked it or not.
大雨で否応なく試合は中止になった。
The match was called off willy-nilly due to heavy rain.
From 否 (いや, 'no') + 応 (おう, 'yes') + なく (adverbial form of ない), literally 'without yes or no'.