adv ·3 syllables ·Rare ·Advanced level

Definitions

Adverb

1. 1
   In a tireless manner; without tiring, flagging, or ceasing.

   "The volunteers worked tirelessly to improve the content."

Adverb

1. 1
   with indefatigable energy wordnet

Synonyms

All synonyms

diligentlydoggedlyenergeticallyfaithfullyferventlyindefatigably

Example

More examples

"Scarcely had her mother left when Mary took control of the house and tirelessly harassed her little brother Tom."

Etymology

From tireless + -ly.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.