tirelessly
adv. manneradv. working very hard for a long time without stopping or getting tired.
adv. with great effort and persistence; in a manner that shows no signs of fatigue or loss of energy.
She worked tirelessly to finish the report on time.
The rescue teams worked tirelessly through the night to find survivors in the wreckage.
The legal team advocated tirelessly for the defendant's rights, eventually uncovering the evidence that led to a full exoneration after years of appeals.
From tireless + -ly.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Typically follows the verb it modifies or the direct object.
He is a tirelessly workerHe is a tireless workerLearners often use the adverb form 'tirelessly' to modify a noun, but the adjective 'tireless' is required in that position.
Last updated May 9, 2026