"warier" in the adjective sense

1. wary

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"

2. leery, mistrustful, suspicious, untrusting, wary

openly distrustful and unwilling to confide

Source: WordNet® (An amazing lexical database of English)

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