to content oneself with; to be resigned to (one's fate); to be contented (satisfied) with (one's lot)
二位という結果に甘んじた。
He settled for second place.
現状に甘んじないで努力を続けた。
She kept working hard without settling for the status quo.
不当な扱いにいつまでも甘んじているわけにはいかない。
I can't keep putting up with unfair treatment forever.