suspicious

adjective

sus·​pi·​cious sə-ˈspi-shəs 

1

: tending to arouse suspicion : questionable

suspicious characters

2

: disposed to suspect : distrustful

suspicious of strangers

3

: expressing or indicative of suspicion

a suspicious glance

suspiciously adverb

suspiciousness noun

Synonyms

• debatable
• disputable
• dodgy [chiefly British]
• doubtable
• doubtful
• dubious
• dubitable
• equivocal
• fishy
• problematic
• problematical
• queer
• questionable
• shady
• shaky
• suspect

Examples of suspicious in a Sentence

We were instructed to report any suspicious activity in the neighborhood.

The suspicious vehicle was reported to police.

Suspicious characters were seen hanging around the bank.

He found a suspicious lump on his back and was afraid it might be cancer.

Officials are suspicious about her death.

His manner made me suspicious.

Recent Examples on the Web

The Context Since Putin's full-scale invasion of Ukraine began in February 2022, a series of mysterious deaths have claimed the lives of prominent Russian figures, including tycoons, businessmen and oil executives—many of whom reportedly fell from windows under suspicious circumstances. —Gordon G. Chang, Newsweek, 3 Mar. 2025

The fire seemed suspicious, police said, and the fire marshal reportedly requested that arson detectives from West Hartford Police and the Connecticut State Police Fire and Explosive Investigative Unit investigate. —From Staff Reports, Hartford Courant, 1 Mar. 2025

Chief Hafer said that Burns had directed his attention to several suspicious fires, and that an official investigation has been conducted during the past two weeks, but without success. ... —The Arkansas Democrat-Gazette, arkansasonline.com, 1 Mar. 2025

Kudrow played Lucia, Bill's protective best friend who's quite suspicious of Dedee. —Raechal Shewfelt, EW.com, 1 Mar. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for suspicious

• adventitious
• cementitious
• expeditious
• inauspicious
• injudicious
• meretricious
• repetitious
• superstitious
• surreptitious
• unambitious
• unpropitious
• unsuspicious

Kids Definition

suspicious

adjective

sus·​pi·​cious sə-ˈspish-əs 

1

: likely to arouse suspicion : questionable

suspicious behavior

2

: likely to suspect or distrust

suspicious of strangers

3

: showing suspicion

a suspicious glance

suspiciously adverb

suspiciousness noun