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indefatigable

adjective · Level 4 · Expert

What does indefatigable mean?

indefatigable (adjective): showing sustained enthusiastic action with unflagging vitality.

Definition: Princeton WordNet 3.1.

How do you use indefatigable in a sentence?

Where does indefatigable come from?

From Middle French, from Latin indēfatīgābilis (“untiring”), from in- (“not”) + dēfatīgō (“to tire out”).

Etymology: Wiktionary, CC BY-SA 4.0.

What are synonyms of indefatigable?

From Princeton WordNet 3.1.

Test yourself: do you know “indefatigable”?

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What does “indefatigable” mean?

basic; minimal; with less than, or only the minimum, necessary

Not quite: that's what rudimentary means.

innate, inherent, inseparable from the thing itself, essential

Not quite: that's what intrinsic means.

full of tiny pores that allow fluids or gasses to pass through

Not quite: that's what porous means.

showing sustained enthusiastic action with unflagging vitality

Right! That's what “indefatigable” means.

Which word is closest in meaning to “indefatigable”?

lavender

Not quite: lavender means something else.

discreet

Not quite: discreet means something else.

tireless

Right!

mythical

Not quite: mythical means something else.

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