na-adjective
deceptive; fraudulent
Describes actions, appearances, or statements that are intentionally misleading or dishonest.
彼の説明は欺瞞的だった。
His explanation was deceptive.
欺瞞的な広告に注意してください。
Please be careful of fraudulent advertisements.
詐欺的 emphasizes criminal fraud or swindling, whereas 欺瞞的 is broader, covering any kind of deception.
Formed from 欺瞞 (giman, 'deception') + 的 (-teki, '-like'). The word 欺瞞 is a Sino-Japanese compound of 欺 (gi, 'deceive') and 瞞 (man, 'deceive').