I'm ready whenever they challenge me

He encouraged me to try again

However hard he may try, he won't succeed

I tried the problem again and again

Red Mulligan has announced that he'll fight Rocky Luciano next month

My brother tried many times to pass the examination, finally succeeding

He often takes a defiant attitude toward us

One of the important differences between Japanese and Americans is that Japanese tend to choose a safe course in life, while Americans choose to explore and challenge life

She stood defiantly with arms akimbo

He shouted defiance at me