ずっと
ずっと · zutto · JLPT N3 · adverb
for a long time
⏳ ZOO-tto: the old zoo has been open all the time, for ages
Say it with a long ZOO at the start, so the sound itself drags on the way the time does. ずっと means something keeps going without a break: ずっと待っていた, I waited the whole time. ずっと前 means a long time ago.