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 one night she told her parents she was feeling lethargic - within 24 hours her symptoms, including a fever, headache, vomiting and a rash on her stomach, worsened and she went to hospital.

From BBC • Dec. 1, 2025

Since saber is all about speed and explosive energy, feeling slow and lethargic before every competition was distressing.

From "Proud" by Ibtihaj Muhammad

Vocabulary lists containing lethargic

ASVAB Word Knowledge

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Essential Academic Vocabulary for High School Students, List 3

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

ACT Vocabulary List

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!