wary

1. Marked by keen caution and watchful prudence (synset 300163651)
   "they were wary in their movements"; "a wary glance at the black clouds"; "taught to be wary of strangers"
   tells us about: chariness, wariness - the trait of being cautious and watchful
   similar to:

   • on guard, on one's guard, on your guard, upon one's guard - vigilant
   • shy - wary and distrustful; disposed to avoid persons or things
2. Openly distrustful and unwilling to confide (synset 302473505)
   similar to: distrustful - having or showing distrust
   same as: leery, mistrustful, suspicious, untrusting

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