puerta
/ˈpweɾta/ · A1 · noun · f
door
🚪 puerta = portal: both from Latin porta, gate (o became ue in Spanish)
Latin porta (gate) gave English portal, port and porter, and Spanish puerta. Stressed Latin o regularly became ue in Spanish: porta → puerta, like fortis → fuerte and mortem → muerte. Swap ue back to o and the English cousin appears.