gul·li·ble
ˈɡələb(ə)l/
adjective
adjective: gullible
easily persuaded to believe something; credulous.
"an attempt to persuade a gullible public to spend their money"
synonyms: credulous, naive, overtrusting, overtrustful, easily deceived, easily taken in, exploitable, dupable, impressionable, unsuspecting, unsuspicious, unwary, ingenuous, innocent, inexperienced, unworldly, green; More