IPA: /ˈloʊðər/
KK: /ˈloʊðər/
A person who strongly dislikes or hates something.
She is a loather of spicy food and avoids it at all costs.
Loather → It is formed from "loathe" (from Old English "lathian", meaning to hate or feel disgust) and "-er" (meaning a person who). A loather is a person who feels strong dislike or hatred towards something.
Think of someone who 'hates' ('loathe') something — the '-er' indicates that this person is defined by that strong feeling. A loather is someone who really dislikes something.