noun, noun or participle which takes 'suru', intransitive verb
eat one's words; break a promise
Formal or literary expression for going back on one's word or failing to keep a promise. Often used in serious contexts.
彼は公約を守らず、食言した。
He broke his promise and ate his words.
政治家の食言は有権者
A politician's broken promises undermine voters' trust.