a. 不屈服的, 不屈不挠的

[ adj ]
impossible to subdue
<adj.all>

Indomitable \In*dom"i*ta*ble\, a. [L. indomitabilis; pref. in-
not + domitare, intens. fr. domare to tame. See {Tame}.]
Not to be subdued; untamable; invincible; as, an indomitable
will, courage, animal.