baby-sit
UK[ˈbeɪbi sɪt]US[ˈbeɪbi sɪt]
v
To take care of a child or children while the parents are away.
v
To take temporary responsibility for something.
Morpheme Breakdown
baby
sit
baby
infant
sit
to be seated
Etymology
The compound verb 'baby-sit' is a modern American English formation from the early 20th century. It is a back-formation from the noun 'baby-sitter', which itself was created by combining the noun 'baby' with the agent noun 'sitter'. The logic is transparent: to 'sit with' a baby, implying staying in the house to guard and care for an infant. The term's meaning later broadened metaphorically to describe temporarily overseeing or minding anything in need of supervision.
Analysis
Structure: baby (infant) + sit (to be seated)
baby: Origin: Middle English, likely imitative of infant speech. Functional role: Noun base, specifying the object of care.
sit: Origin: Old English 'sittan', from Proto-Germanic. Functional role: Verb, indicating the action of staying in place to watch over.
Examples
She was asked to baby-sit her neighbor's twins on Saturday evening.
Can you baby-sit my plants while I'm on vacation?
He had to baby-sit the new intern for the first week.