unswerving; steadfast; unchanging from beginning to end

to vow to stay true to one's goals and never change; used to describe a firm and unswerving determination

remain faithful until death; will never change even unto death

unswerving in one's loyalty; faithful and constant; describes someone whose devotion and integrity never change

to persist in something without change; to be unswerving; to hold fast to a commitment or belief

to be loyal through thick and thin; unyielding integrity

to faithfully and strictly adhere to a promise, agreement, or principle without changing or wavering

to remain unswervingly true to a promise or commitment; to stand by one's word without changing