Antonyms of adj wary

2 senses of wary

Sense 1
wary (vs. unwary) -- (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")

unwary (vs. wary) -- (not alert to danger or deception; "the shrieks of unwary animals taken by surprise"; "some thieves prey especially on unwary travelers"; "seduce the unwary reader into easy acquiescence"- O.J.Campbell)
        => gullible -- (easily tricked because of being too trusting; "gullible tourists taken in by the shell game")
        => unguarded -- (displaying or feeling no wariness; "an unguarded remark")

Sense 2
leery, mistrustful, suspicious, untrusting, wary -- (openly distrustful and unwilling to confide)

INDIRECT (VIA distrustful) -> trustful, trusting -- (inclined to believe or confide readily; full of trust; "great brown eye, true and trustful"- Nordhoff & Hall)

Similarity of adj wary

2 senses of wary

Sense 1
wary (vs. unwary) -- (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")
       => on guard, on one's guard (predicate), upon one's guard (predicate), on your guard -- (vigilant; "on guard against con artists"; "must remain on your guard in such a situation")
       => shy -- (wary and distrustful; disposed to avoid persons or things; "shy of strangers")

Sense 2
leery, mistrustful, suspicious, untrusting, wary -- (openly distrustful and unwilling to confide)
       => distrustful (vs. trustful) -- (having or showing distrust; "a man of distrustful nature"; "my experience...in other fields of law has made me distrustful of rules of thumb generally"- B.N.Cardozo; "vigilant and distrustful superintendence"- Thomas Jefferson)