sluggish

adjective

slug·​gish ˈslə-gish 

1

: averse to activity or exertion : indolent

also : torpid

2

: slow to respond (as to stimulation or treatment)

3

a

: markedly slow in movement, flow, or growth

b

: economically inactive or slow

sluggishly adverb

sluggishness noun

Synonyms of sluggish

• slow
• leisurely
• lagging

Examples of sluggish in a Sentence

The game picked up after a sluggish start.

the sluggish pace of the project is worrisome

Recent Examples on the Web

My numbers reveal low iron, a vitamin-D deficiency, elevated cholesterol (likely genetic), and a sluggish thyroid that will require follow-up testing back home. — Abby Montanez, Robb Report, 23 Aug. 2026

After another sluggish start by the first five, coach Natalie Nakase handed the reins over to her reserves for the majority of the second half. — Joseph Dycus, Mercury News, 22 Aug. 2026

Hull was clearly ready for the opening fixture of the new campaign while Manchester United was sluggish. — Graham Ruthven, Forbes.com, 22 Aug. 2026

But job growth is sluggish, and other sectors are suffering from the president’s signature policy. — Lauren Kaori Gurley, Washington Post, 19 Aug. 2026

Word History

First Known Use

15th century, in the meaning defined at sense 1

Kids Definition

sluggish

adjective

slug·​gish ˈsləg-ish 

: slow in movement or reaction by habit or condition

sluggishly adverb

sluggishness noun

Medical Definition

sluggish

adjective

slug·​gish ˈsləg-ish 

: markedly slow in movement, progression, or response

sluggish healing

sluggishly adverb

sluggishness noun