aún
ah-OON
still, yet
1. La novia y los invitados se están poniendo nerviosos; aún no ha llegado el novio a la iglesia.
The bride and the guests are getting nervous; the groom still hasn't showed up at the church.
2. Este omelet está bueno, pero con un poco de tocino quedaría aún mejor.
This omelette is good, but with a bit of bacon it would be better still.
Notes
Don’t confuse "aún" with "aun!" Without an accent mark, the word means "even." A good rule of thumb would be to ask whether you could use "todavía" (which also means "still") as a substitute: if you can, use "aún." Both words have accents!