D defs.my
Entry 1 sense Webster, 1913

Disbelieve

/dĭs-bəl-ēv'/ · Dis·be·lieve · IPA /dɪsbɪˈliːv/
01 v. t. Not to believe; to refuse belief or credence to; to hold not to be true or actual.
imp. & p. p. Disbelieved; p. pr. & vb. n. Disbelieving
  1. 1.
    Not to believe; to refuse belief or credence to; to hold not to be true or actual.
    “Assertions for which there is abundant positive evidence are often disbelieved, on account of what is called their improbability or impossibility.” — J. S. Mill.