顽强

他很顽强。

Tā hěn wánqiáng

He is very strong-willed

她面对困难从不放弃，非常顽强。

Tā miàn duì kùndǎn cóng bù xiànzì, fēicháng wánqiáng.

She never gives up in the face of difficulties, she is extremely determined