IPA: //ˈdeɪ.kɛər//
KK: /ˈdeɪˌkɛr/
A place where children are cared for during the day while their parents are at work or busy with other activities.
She takes her son to daycare every morning before going to work.
Daycare is formed from "day" (from Old English "dæg", meaning a period of 24 hours) and "care" (from Old French "carer", meaning to take care of). The word refers to a place where children are cared for during the day.
Think of a 'day' as a time period and 'care' as looking after someone — daycare is where children are looked after during the day.