The Spanish vínculo (“a link, connection, something that binds something to something else”) comes from the Latin for the same, vinculum.
A distantly related word is the English wind — not in the sense of what blows in your face on a windy day but rather in the sense of winding a clock (remember those ancient clocks?). Wind (again, in this sense) comes from the Proto-Indo-European *wendh- (“to turn, weave, or wind”) from which we also get the Latin vinculum and finally the Spanish vínculo.
We can we can see that the v-n of vínculo maps to the w-n of wind.
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