unto
un·to
preposition \ˈən-(ˌ)tü\—used in the past like “to”
Full Definition of UNTO
1
: to
2
—used as a function word to indicate reference or concern <they became a world unto themselves — Anne T. Fleming>
See Origin of UNTO
Middle English, probably from un- (as in until) + to to
First Known Use: 14th century
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