1) Be suspicious of 2) Discredit 3) Doubt 4) Exclusively Anglo word 5) Exclusively Saxon word 6) Have doubts about 7) Have misgivings about 8) Mistrust 9) Refuse to accept 10) Regard as false 11) Reject 12) Reject as false 13) Suspect 14) To actively deny 15) To cease to believe 16) To exercise disbelief Found on https://www.crosswordclues.com/clue/disbelieve
Dis`be·lieve' transitive verb [ imperfect & past participle Disbelieved ; present participle & verbal noun Disbelieving .] Not to believe; to refuse belief or credence to; to hold not to be true or actual. « Assertions for which the... Found on http://www.encyclo.co.uk/webster/D/75