頑

stubborn and ignorant

being of very robust health

attitude that one must keep going no matter what

time to give one's all; time to do one's best; time to shine

headstrong; obstinate; bullheaded

obstinate; stubborn; hard-headed; pigheaded; incapable of making sound judgements because of a narrow, inflexible and obstinate mentality

enstatite

pull together!; give it your best shot!; let's do this!

'taru' adjective

resolute; obstinate; stubborn