indefatigable etymology

Etymology

• Latin: indefatigabilis
• Prefix: in- (not)
• Root: defatigare (to tire out, exhaust)
• Suffix: -bilis (able to be)

Meaning and Origin

The word indefatigable entered English in the early 16th century via Middle French. Its Latin root defatigare means "to tire out" or "exhaust." The prefix in- negates this meaning, resulting in the opposite: "not tireable" or "unwearied." The suffix -bilis indicates that something is "able to be."

Therefore, indefatigable means "incapable of being tired out" or "unflagging." It describes individuals or efforts that are marked by tireless energy and determination.

Examples of Usage

• The indefatigable hikers completed the 10-mile trek with ease.
• The athlete's indefatigable spirit carried her to victory.
• The research team's indefatigable efforts led to a groundbreaking discovery.

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