Declining or refusing an offer; withdrawing acceptance (e.g., pulling out of candidacy); excusing oneself from something.
彼は昇進の申し出を辞退した。
He declined the offer of promotion.
大会の出場を体調不良で辞退した。
He withdrew from the competition due to poor health.
ご厚意はありがたいが、今回は辞退させてください。
I appreciate your kindness, but please allow me to decline this time.