1
Stage 1 of 3
warjan
Frankish · medieval
"to protect, to guard"
to protect, to guard, a Germanic root of the Franks
2
Stage 2 of 3
garantie
Old French · medieval
"a formal assurance or promise"
adapted from Frankish for a formal assurance or promise
3
Stage 3 of 3
guarantee
English · 1600s
"a formal promise that something will happen or be true"
settled as the English word for a formal promise that something will happen
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