1
tenacity;endurance
私は持ち前の頑張りの精神で難関を突破した。
I got over the difficulty with my characteristic tenacity.
1
to persevere;to persist;to keep at it;to hang on;to hold out;to do one's best
いや、頑張ればできるよ。
Yes, he can, if he tries hard.
2
to insist that;to stick to (one's opinion)
3
to remain in a place;to stick to one's post;to refuse to budge