steadfast
/ˈstedfɑ:st; ?@ -fæst; `stɛdˌfæst/ adj
~ (in sth/to sb/sth) (fml usu approv 文, 通常作褒义) firm and not changing or yielding; constant 坚定的; 不动摇的; 固定不动的
a steadfast friend 忠实的朋友
a steadfast gaze, refusal 凝视、 坚决的拒绝
steadfast in adversity 在逆境中毫不动摇
be steadfast to one's principles 坚持自己的原则.