instar - to urge, to press, to be urgent

instaurar - to found

intensificar - to intensify, to make stronger

intercambiar - to interchange, to exchange, to swap

interceptar - to intercept, to block

interferir - to interfere

intermediar - to mediate, to intercede, to intervene

interrumpir - to break, to interrupt

intervenir - to intervene

intrigar - to intrigue, to interest

invernar - to hibernate