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 national chain of some 140 hospitals detected suspicious activity Wednesday and began working to determine if sensitive information had been compromised. —Binghui Huang, The Indianapolis Star, 9 May 2024

Red flags include suspicious wires and tiny flashing lights. —Kim Komando, USA TODAY, 9 May 2024

Word History

First Known Use

14th century, in the meaning defined at sense 1

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