wary

Describe yourself as wary if you don't quite trust someone or something and want to proceed with caution. Be wary of risky things like wild mushrooms and Internet deals!

You can trace wary through Old English back to Old High German giwar "aware, attentive." If you keep a wary eye on something, you are attentive for signs that it is becoming dangerous. Likewise, if you give someone a wary glance, your face conveys the suspicion and caution you feel. When you are wary of driving alone at night or making promises, you fear something bad might happen if you do these things.

Definitions of wary
  1. adjective
    marked by keen caution and watchful prudence
    “they were wary in their movements”
    “a wary glance at the black clouds”
    “taught to be wary of strangers”
    Synonyms:
    on guard, on one's guard, on your guard, upon one's guard
    vigilant
    shy
    wary and distrustful; disposed to avoid persons or things
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    Antonyms:
    unwary
    not alert to danger or deception
    gullible
    easily tricked because of being too trusting
    unguarded
    displaying or feeling no wariness
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  2. adjective
    openly distrustful and unwilling to confide
    synonyms: leery, mistrustful, suspicious, untrusting
    distrustful
    having or showing distrust
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