tireless
[adjective]
Synonyms: energetic, indefatigable, industrious, resolute, unflagging, untiring, vigorous

---

Contrasted words: inactive, listless, tired, unenergetic, unenthusiastic, weak
Related Words: active, enthusiastic

---

English Thesaurus: energetic, full of energy/bursting with energy, dynamic, hyperactive, tireless, ...

[TahlilGaran] English Synonym Dictionary ▲

tire‧less /ˈtaɪələs $ ˈtaɪr-/ adjective
[Word Family: adjective: tired, tireless, tiresome, tiring; verb: tire; noun: tiredness; adverb: tirelessly]
working very hard in a determined way without stopping:
the tireless efforts of the rescue workers
—tirelessly adverb

[TahlilGaran] Dictionary of Contemporary English ▲

energetic having a lot of energy:
If you’re feeling energetic, we could go out for a run.
full of energy/bursting with energy energetic and ready to work hard or do a lot of things:
I admire her because she’s so full of energy and enthusiasm.
When she first started at the college she was bursting with energy and full of new ideas.
dynamic very energetic and always wanting to do new things:
What this country needs is a dynamic new leader.
hyperactive having more energy than is normal or good, because you cannot keep still or quiet for very long – used especially about children:
Our youngest daughter was hyperactive, and it had a damaging effect on the whole family.
tireless working with a lot of energy in a determined way, especially to achieve a particular thing:
She was a tireless campaigner against apartheid in South Africa.
full of beans informal feeling energetic and happy and showing this in the way you behave:
He’s one of those people who leap out of bed full of beans every morning.

[TahlilGaran] English Thesaurus ▲