D defs.my
Entry 2 senses Webster, 1913

Mystify

/mĭs'-təf-īˌ/ · Mys·ti·fy · IPA /ˈmɪstɪfaɪ/
01 v. t. To involve in mystery; to make obscure or difficult to understand; as, to mystify a passage of Scripture.
imp. & p. p. Mystified; p. pr. & vb. n. Mystifying
  1. 1.
    To involve in mystery; to make obscure or difficult to understand; as, to mystify a passage of Scripture.
  2. 2.
    To perplex the mind of; to puzzle; to impose upon the credulity of; to baffle; as, to mystify an opponent.
    “He took undue advantage of his credulity and mystified him exceedingly.” — Ld. Campbell.