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Definitions

suspicious

[suh-spish-uhs] / səˈspɪʃ əs /
ADJECTIVE
distrustful
Synonyms
STRONGEST
apprehensive careful cautious doubtful incredulous jealous leery mistrustful skeptical wary watchful
WEAK
cagey green-eyed in doubt not born yesterday on the lookout questioning quizzical suspect suspecting unbelieving uptight without belief without faith wondering
Antonyms
STRONGEST
believing careless certain confident convinced heedless inattentive incautious rash sure thoughtless trusting uncareful undoubting
WEAK
believable indubious innocent palpable trustworthy trusty undoubted unquestionable
ADJECTIVE
doubtful, fishy
Synonyms
STRONGEST
dubious questionable uncertain unsure unusual
WEAK
borderline debatable different disputable doubtable equivocal farfetched funny irregular not kosher open open to doubt open to question out of line overt peculiar phony problematic reaching rings untrue shady shaky suspect too much uncommon won't wash
Antonyms
STRONGEST
certain clear definite secure sure undoubted
WEAK
believable indubious innocent palpable trustworthy trusty unquestionable

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.

Ion is tailored for procedures in the lung, typically to sample suspicious nodules or legions as part of a cancer diagnosis.

From Barron's • Apr. 21, 2026

He was connected to other suspicious merchandise returns through credit card records.

From Los Angeles Times • Apr. 19, 2026

It wasn’t just the silicone that media outlets had branded suspicious and sinister.

From Slate • Apr. 19, 2026

We’re suspicious of emails written in broken English and direct messages from social-media accounts that were created yesterday.

From The Wall Street Journal • Apr. 16, 2026

But my suspicious mind kept telling me not to trust him too much, to be extra careful around him.

From "Summer of the Mariposas" by Guadalupe García McCall

Vocabulary lists containing suspicious

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Harry Potter and the Prisoner of Azkaban

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Legend

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