gullible
[ˈɡələb(ə)l]
ADJECTIVE
easily persuaded to believe something; credulous.
synonyms:
credulous · over-trusting · over-trustful · trustful · easily deceived/led · easily taken in · exploitable · ripe for the picking · dupable · deceivable · impressionable · unsuspecting · unsuspicious · unwary · unguarded · unskeptical · ingenuous · naive · innocent · simple · inexperienced · unworldly · green · as green as grass · childlike · ignorant · foolish · silly