indefatigable

What does “indefatigable” mean?

adjective.(of a person or their efforts) persisting tirelessly.

SAT Usage

the term is often found in passages about perseverance, motivation, or historical figures known for their relentless efforts, such as activists or scientists. It emphasizes an unwavering commitment and energy, suggesting not just persistence but an almost unflagging spirit, distinguishing it from similar words like "tenacious," which may imply stubbornness rather than tirelessness.

Common Confusions

Indefatigable implies a tireless persistence in effort, while relentless usually suggests an unyielding or harsh pursuit that may not consider the well-being of others.

Example Sentences

• The indefatigable volunteer worked double shifts all week.

Word Parts: How to Remember “indefatigable”

Break “indefatigable” into its parts: in- (not). Knowing roots like these helps you decode unfamiliar SAT vocabulary.

• Prefix: in- not (Latin)