IPA: /ˈkɛrər/
KK: /ˈkɛrər/
A person who takes care of someone else, often providing support and assistance, especially in a family or professional context.
She works as a carer for elderly people in her community.
Carer is formed from "care" (from Old English "carian", meaning to be anxious or to feel concern) and "-er" (meaning a person who). A carer is a person who provides care or concern for someone else.
Think of someone who is 'concerned' ('care') for another person — the '-er' indicates that this person is actively providing that care.