Busy and Indefatigable

Busy

Busy adjective - Involved in often constant activity.
Usage example: the deadline is in two days, so everyone at work has been extremely busy

Indefatigable and busy are semantically related. In some cases you can use "Indefatigable" instead an adjective "Busy".

Nearby Words: busily, busyness, busied, busying

Indefatigable

Indefatigable adjective - Showing no signs of weariness even after long hard effort.
Usage example: an indefatigable laborer who can work from sunrise to sunset

Busy and indefatigable are semantically related. Sometimes you can use "Busy" instead an adjective "Indefatigable".
Cite this Source
Indefatigable and Busy. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/busy/indefatigable
Busy & Indefatigable. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/busy/indefatigable>.
Indefatigable or Busy. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/busy/indefatigable.
Google Ngram Viewer shows how "busy" and "indefatigable" have occurred on timeline