indefatigable
in di fa ti guh buhl
- s showing sustained enthusiastic action with unflagging vitality
an indefatigable advocate of equal rights
- The football team had an indefatigable amount of drive and focus.
- At age 16, with just a ninth-grade education, $500 in seed capital and indefatigable drive, he set up a roadside stall in Beijing to sell radios and gadgets purchased from .
- With her indefatigable persistence, resourcefulness and good humor, Arianna, 55, has gone from ambitious project to ambitious project with varying degrees of success, finding .