An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

To state that (something declared or believed to be true) is not true (Dictionary.com).

M.E. denien, from O.Fr. denoiir "deny, repudiate, withhold," from L. denegare "to deny, reject, refuse," from → de- "away" + negare "refuse, say no," from Old L. nec "not," from PIE root *ne- "no, not."

Niyârdan, literally "to bring (say) no," from ni-, variant of na→ not, → non-, → un-, + ârdan contraction of âvardan "to bring; to cause or produce," → production.