i Register
In some senses, leery is marked as obsolete, slang, UK. Watch for register when choosing this word.
adj
Cautious, suspicious, wary, hesitant, or nervous about something; having reservations or concerns.
Since he was bitten by a dog when he was young, he has always been leery of animals.
“[…]He was one of their top gun-fighters—always up to his ears in the thick of any fightin' that was goin' on. He never was leery of anything on two feet, I'll say that much for'm.”
Sly; artful; knowing.
Leering; lecherous or unpleasant.
And there was a particularly brutal villain with leery eyes, ugly mouth, with one tooth gone, and an iron jaw like a hull-dog's.