IPA: /məˈlɛstər/
KK: /mɒˈlɛstər/
A person who engages in unwanted or inappropriate sexual behavior towards another person.
The community was shocked to learn that a molester had been living among them.
Molester → It is formed from "moles" (from Latin, meaning mass or burden) and the suffix "-er" (meaning one who). The word "molester" refers to one who causes a burden or harm to another, particularly in a sexual context.
Think of someone who causes a 'burden' ('moles') to another person — that's why 'molester' refers to someone who harms or abuses.