stead·fast /ˈstedfɑːst $ -fæst/ adjectiveadj literary 1 DETERMINEDFAITHFULfaithful and very loyal 忠实的,忠诚的 her father’s steadfast love for her 她父亲对她永不改变的爱
2 being certain that you are right about something and refusing to change your opinion in any way 坚定的,毫不动摇的steadfast in Dr Faraday remained steadfast in his plea of innocence. 法拉第医生坚持自己无罪的抗辩。
—steadfastly adverbadv
—steadfastness noun [uncountableU]