lethargic

[luh-thahr-jik] / ləˈθɑr dʒɪk /

ADJECTIVE

lazy, sluggish

Synonyms

STRONGEST

apathetic dull lackadaisical laid-back languid listless passive sleepy

WEAK

blah comatose debilitated dilatory dopey dormant draggy drowsy enervated having spring fever heavy idle impassive inactive indifferent inert laggard languorous moony nebbish out of it phlegmatic sleepyhead slothful slow slumberous snoozy somnolent spiritless stolid stretchy stupefied supine torpid wimpy

Antonyms

STRONGEST

active alert animated caring energetic lively vivacious

WEAK

busy vital

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Many taking weight-loss medications initially lose fat and feel great, but quickly start to feel weak and lethargic, he said.

From The Wall Street Journal • May 17, 2026

A baby boy in Kentucky vomited before becoming lethargic.

From Salon • May 7, 2026

"It was just a really lethargic performance in the first half, but the second half was everything I wanted to see."

From Barron's • Jan. 31, 2026

But never have I seen a team with so much potential and skill be so absolutely lethargic and unwatchable this season.

From Los Angeles Times • Dec. 27, 2025

One was the conviction of the stocky, beetle-browed Hungarian physicist that the lethargic pace of thermonuclear research had placed the United States at the mercy of the Soviet Union.

From "Big Science" by Michael Hiltzik

Vocabulary lists containing lethargic

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Essential Academic Vocabulary for High School Students, List 3

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ACT Vocabulary List

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