hater (n.)

Old English hatian "regard with extreme ill-will, have a passionate aversion to, treat as an enemy," from Proto-Germanic *haton (source also of Old Saxon haton, Old Norse hata, German hassen, Gothic hatan "to hate"), from PIE root *kad- "sorrow, hatred" (source also of Avestan sadra- "grief, sorrow, calamity;" Greek kēdos "care, trouble, sorrow, mourning, funeral rites;" Welsh cas "pain, anger"). Related: Hated; hating. French haine (n.), haïr (v.) are from Germanic.

"misanthrope," 1570s, from man (n.) + hater. Old English had mannhata "man-hater." Often in old use of Timon of Athens. Meaning "a woman who hates the male sex" is by 1839.