envió
Envió, with the accent on the o, is the third-person singular preterite form of the Spanish verb enviar. It denotes a completed action of sending something in the past. For example: “Él envió la carta ayer” or “Ella envió el informe a sus superiores.” The accent marks the verb form and helps distinguish it from related words.
Envío, which carries an accent on the í, is a noun meaning shipment, consignment, or the act
Both forms originate from the same verb enviar. In written Spanish, the accent is essential to differentiate