elanochecer

nightfall; dusk

Al anochecer, las luces del puerto se encendieron una a una. At nightfall, the harbour lights came on one by one.

Los murciélagos salen de la cueva al anochecer. The bats leave the cave at dusk.

Llegaremos antes del anochecer si no hay tráfico. We'll arrive before nightfall if there is no traffic.