enviarlas
Enviarlas is the infinitive form of the Spanish verb enviar with the direct object pronoun las attached, meaning “to send them.” The base verb enviar means to send or dispatch something, and the attached las specifies a feminine plural set of objects (for example, las cartas, las facturas). The pronoun must agree in gender and number with the nouns it replaces; if the objects were masculine plural, the form would be enviarlos.
Grammatical notes: Enviarlas can function in periphrastic constructions with auxiliary verbs or in simple infinitive clauses.
Common usage: Enviarlas appears in everyday and formal contexts involving sending feminine plural items by mail,