Cosecha (Spanish for “harvest”) comes from the Latin collectus, meaning, “collected.”
This makes sense: a harvest is, well, just collected.
Although the English collected is almost identical to the Latin, we can see how the Latin changed into the Spanish: the -ll- turned into an -s-, in a curious change. But — as is more common — the -ct- became a -ch- (think nocturnal/noche or octagon/ocho). Thus, the c-ll-ct of collect maps to the c-s-ch of cosecha.
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