1) Careless 2) Easily tripped up 3) Gullible 4) Heedless 5) Incautious 6) Lacking caution 7) Not alert 8) Not careful 9) Not on the ball 10) Not wary 11) Unguarded Found on https://www.crosswordclues.com/clue/unwary
• (a.) Unexpected; unforeseen; unware. • (a.) Not vigilant against danger; not wary or cautious; unguarded; precipitate; heedless; careless. Found on http://thinkexist.com/dictionary/meaning/unwary/
adjective 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 Found on https://www.encyclo.co.uk/local/20974