indefatigably
2 synonyms for indefatigably, grouped by meaning and by how common each one is.
Adv — Without ever seeming to get tired or give up.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Etymology
From indefatigable + -ly, but indefatigable itself was attested later. In use since the 16th century.
Full origin of indefatigably →