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suspicious (adj.)

mid-14c., "deserving of or exciting suspicion," from Old French sospecious, from Latin suspiciosus, suspitiosus "exciting suspicion, causing mistrust," also "full of suspicion, ready to suspect," from stem of suspicere "look up at" (see suspect (adj.)). Meaning "full of suspicion, inclined to suspect" in English is attested from c. 1400. Poe (c. 1845) proposed suspectful to take one of the two conflicting senses. Related: suspiciously; suspiciousness.

Entries related to suspicious

suspect (adj.)
early 14c., "suspected of wrongdoing, under suspicion;" mid-14c., "regarded with mistrust, liable to arouse suspicion," from Old French suspect (14c.), from Latin suspectus "suspected, regarded with suspicion or mistrust," past participle of suspicere "look up at, look upward," figuratively "look up to, admire, respect;" also "look at secretly, look askance at," hence, figuratively, "mistrust, regard with suspicion," from assimilated form of sub "up to" (see sub-) + specere "to look at" (from PIE root *spek- "to observe"). The notion behind the word is "look at secretly," hence, "look at distrustfully."
*spek- 
Proto-Indo-European root meaning "to observe."

It forms all or part of: aspect; auspex; auspices; auspicious; bishop; circumspect; conspicuous; despicable; despise; episcopal; especial; espionage; espy; expect; frontispiece; gyroscope; haruspex; horoscope; inspect; inspection; inspector; introspect; introspection; perspective; perspicacious; perspicacity; prospect; prospective; respect; respite; retrospect; scope; -scope; scopophilia; -scopy; skeptic; species; specimen; specious; spectacle; spectacular; spectrum; speculate; speculation; speculum; spice; spy; suspect; suspicion; suspicious; telescope.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit spasati "sees;" Avestan spasyeiti "spies;" Greek skopein "behold, look, consider," skeptesthai "to look at," skopos "watcher, one who watches;" Latin specere "to look at;" Old High German spehhon "to spy," German spähen "to spy."

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Definitions of suspicious from WordNet

suspicious (adj.)
openly distrustful and unwilling to confide;
Synonyms: leery / mistrustful / untrusting / wary
suspicious (adj.)
not as expected;
suspicious behavior
Synonyms: fishy / funny / shady / suspect
From wordnet.princeton.edu

Dictionary entries near suspicious

suspenders

suspense

suspenseful

suspension

suspicion

suspicious

suspiration

suspire

Susquehanna

suss

Sussex

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