indefatigable
5
9.3
- adjective
- /ˌɪndɪˈfætɪɡəbl/
- Formal
- Despite the long hours, he remained indefatigable, tirelessly working to meet the project deadline.
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Watch on YouTubeAnyone who knows David knows that he has been indefatigable in helping put today's event together.
- Anyone who knows David knows that he has been indefatigable in helping put today's event together.
- And they go, OK, maybe this isn't maybe the Thousand Year Reich in the Aryan race isn't this indefatigable force that we presume.
- We grind lenses to an impossible strength, point them toward the future, and dream of beings will welcome with indefatigable hospitality.
Examples
-
Born comes to mind, and your indefatigable efforts will ultimately be recognized.
Blog text (12) -
Tonton Georges, the indefatigable bachelor war hero, was also my godfather.
Fiction book (1997) -
Kapteyn was becoming known as an indefatigable and extremely careful worker.
Academic text (1991) -
Like Sir Henry, Hives was an indefatigable worker.
Academic text (1997) -
Into this perfect storm, Alan Dundes stepped with his indefatigable optimism.
Academic text (2017) -
I would be remiss to end this preface without thanking all of the people whose indefatigable work has made this issue possible.
Academic text (2009) -
You've turned disasters into triumphs with your sheer, joyful, indefatigable, infectious lust for life.
-
Consider our women's soccer team or the indefatigable Misty May-Treanor and Kerri Walsh Jennings.
Blog text (14) -
Her indefatigable spirit kept the team motivated even during the toughest challenges.
-
The teacher was indefatigable in her efforts to help every student succeed.
Synonyms
129
5.1
Keeps going without stopping and stays very strong
55
4.4
Continuing with an action despite problems or opposition
32
7.0
Not stopping and not getting less strong
28
3.8
Has a lot of energy and keeps working without stopping
11
8.6
Impossible to stop or change
10
8.1
Someone very determined and brave who cannot be defeated
5
4.9
Always reliable and steady
3
7.5
Always having energy and not giving up
1
3.9
Able to keep working with steady energy for a long time
1
4.8
To keep trying to do something despite problems
1
7.7
Being full of energy and enthusiasm and not getting tired
Antonyms
How Tireless
Surface Forms
Morphology
indefatigable = defatigable (transparent) = in + defatigable
The form is transparently built as in- + defatigable, but 'defatigable' is rare/obsolete so the immediate base may be unfamiliar to many learners.
Etymology
The word indefatigable comes from the prefix in- meaning 'not' and the root fatigue from old Latin fatigare meaning 'to tire'. So an indefatigable person does not get tired and keeps working.