If you describe someone or their efforts as tireless, you approve of the fact that they put a lot of hard work into something, and refuse to give up or take a rest.
[approval]
He was a tireless worker for justice.
...the charity's tireless efforts to help the poor.
Synonyms: energetic, vigorous, industrious, determined More Synonyms of tireless
tirelesslyadverb [ADVERB with verb]
He worked tirelessly for the cause of health and safety.
tireless in British English
(ˈtaɪəlɪs)
adjective
unable to be tired; indefatigable
Derived forms
tirelessly (ˈtirelessly)
adverb
tirelessness (ˈtirelessness)
noun
tireless in American English
(ˈtaɪrlɪs)
adjective
1.
that does not become tired; untiring or unwavering
2.
characteristic of a tireless person; continuing, persistent, etc.
one's tireless efforts
Derived forms
tirelessly (ˈtirelessly)
adverb
tirelessness (ˈtirelessness)
noun
Examples of 'tireless' in a sentence
tireless
Pals launched a campaign for a knighthood to honour his bravery and his tireless charity work since the war.
The Sun (2017)
We have tireless workers but they want their chance.
Times, Sunday Times (2014)
Took his goal superbly and a tireless worker.
The Sun (2013)
His tireless effort for the cause makes him stand out.
The Sun (2010)
The guy is tireless in the work that very few others want to do.
The Sun (2006)
She was closely involved in his tireless charity work on behalf of arthritis sufferers.
Times, Sunday Times (2012)
Less known was his tireless work to support disabled people.
Times, Sunday Times (2013)
The striker produced a tireless display.
The Sun (2013)
The Horse enjoys challenges and is a methodical and tireless worker.
Times, Sunday Times (2007)
But he's always a tireless worker.
The Sun (2013)
This they did with whole heart, tireless effort and great enthusiasm.
Admiral Sandy Woodward, With Patrick Robinson ONE HUNDRED DAYS (2003)
Perhaps more importantly, he was a tireless campaigner to open up the countryside.
Times, Sunday Times (2013)
He defended art over commerce at all times, and was a tireless worker right up to the end.
The Sun (2013)
A tireless worker who looks set for Test recognition.
The Sun (2009)
A tireless worker who harried City in the first half and found himself in attacking positions.
Times, Sunday Times (2014)
His tireless efforts were rewarded with a first England cap in June.
The Sun (2015)
His tireless efforts to promote the education of chemistry included setting up a teachers' centre in Newcastle.
Times, Sunday Times (2012)
HE gets up and down the pitch all day and been selected by successive England managers for that tireless work ethic.
The Sun (2014)
My role as assistant editor during his tenure was made immeasurably easier by his tireless capacity for work, his searing intelligence and his courteous good humour.
Times, Sunday Times (2010)
Day after day, he will bring bauble after bauble - a tireless display of devotion to his future bird.
Times, Sunday Times (2008)
He is a tireless worker on behalf of charities, both in his home town of Stoke and around the world.
The Sun (2007)
But she was admired also for her tireless work in a number of other roles - society hostess, patron of the arts and charity worker.
Times, Sunday Times (2006)
In other languages
tireless
British English: tireless ADJECTIVE
If you describe someone or their efforts as tireless, you approve of the fact that they put a lot of hard work into something, and refuse to give up or take a rest.
...her tireless efforts to help the poor.
American English: tireless
Brazilian Portuguese: incansável
Chinese: 孜孜不倦的
European Spanish: incansable
French: infatigable
German: unermüdlich
Italian: instancabile
Japanese: 精力的な
Korean: 지칠 줄 모르는
European Portuguese: incansável
Latin American Spanish: incansable
(adjective)
Definition
energetic and determined
He was a tireless worker for justice.
Synonyms
energetic
Two-year-olds can be incredibly energetic.
vigorous
industrious
She was an industrious and willing worker
determined
resolute
indefatigable
His indefatigable spirit helped him to cope with the illness.
unflagging
He was sustained by the unflagging support of his family.
untiring
an untiring fighter for justice, democracy and tolerance
unwearied
Opposites
tired
,
exhausted
,
fatigued
,
weary
,
flagging
,
drained
,
worn out
Additional synonyms
in the sense of indefatigable
Definition
never getting tired or giving up
His indefatigable spirit helped him to cope with the illness.
Synonyms
tireless,
dogged,
persevering,
patient,
relentless,
diligent,
inexhaustible,
unremitting,
assiduous,
unflagging,
untiring,
sedulous,
pertinacious,
unwearying,
unwearied
in the sense of industrious
Definition
hard-working
She was an industrious and willing worker
Synonyms
hard-working,
diligent,
active,
busy,
steady,
productive,
energetic,
conscientious,
tireless,
zealous,
laborious,
assiduous,
sedulous
in the sense of unflagging
He was sustained by the unflagging support of his family.
Synonyms
constant,
steady,
tireless,
fixed,
persistent,
staunch,
persevering,
unremitting,
indefatigable,
unfailing,
unceasing,
untiring,
unfaltering,
undeviating,
unwearied
Synonyms of 'tireless'
tireless
Explore 'tireless' in the dictionary
Additional synonyms
in the sense of untiring
an untiring fighter for justice, democracy and tolerance