naysayer

Etymology
Origin: 1715–1725, from, equivalent to. First recorded use: 1721.

Noun

 * 1) One who consistently denies, criticizes, or doubts; a detractor.

Translations

 * Arabic: مُتَعَرِّض, عَارِض
 * Chinese:
 * Mandarin: ,
 * Finnish: ;
 * German:, Nein-Sager, , Nein-Sagerin, , , Lästerer
 * Plautdietsch: Dreikopp