Indefatigable

Adjective

Definition: Characterized by being tireless, persistent, and unflagging.

Synonyms: Tireless, Unflagging, Unwearied, Energetic, Persistent

Antonyms: Lethargic, Lazy, Weary, Tired

Examples:

Despite working long hours, he showed an indefatigable spirit.
The team's indefatigable efforts led to their success.

Mnemonics:

"In-de-fatigable" - someone who doesn't give in to fatigue.

Etymology:

Origin:

The word "indefatigable" originated from the Latin word "indefatigabilis" which means "not capable of being wearied."

Historical Usage:

The term has been used in English since the late 16th century. It is derived from the concept of having boundless energy and perseverance, indicating a person's ability to continue working without becoming tired or fatigued.

Related Idioms:

Idiom:

None identified

Explanation:

The prefix "in-" in "indefatigable" serves as a negation, meaning "not." Therefore, "indefatigable" means "not capable of being fatigued" or "tireless," rather than someone who is easily fatigued.

Misconceptions:

Misconception:

Confusing "indefatigable" with "fatigable" or "defatigable."

Explanation:

The prefix "in-" in "indefatigable" serves as a negation, meaning "not." Therefore, "indefatigable" means "not capable of being fatigued" or "tireless," rather than someone who is easily fatigued.