perseverance

work into the ground: Idiom Meaning and Origin

when the chips are down: Idiom Meaning and Origin

weather the storm: Idiom Meaning and Origin

wait out: Idiom Meaning and Origin

toughen up: Idiom Meaning and Origin

to the death: Idiom Meaning and Origin

tooth-and-nail: Idiom Meaning and Origin

the show must go on: Idiom Meaning and Origin

swim upstream: Idiom Meaning and Origin

stop at nothing: Idiom Meaning and Origin

stick with: Idiom Meaning and Origin

spare no effort: Idiom Meaning and Origin