うわあー

wow!, whoa!

interjection Rare #39,902
wow!, whoa! An exclamation of surprise or amazement; the stretched spelling conveys an especially drawn-out reaction.
JA: うわあー、きれい!
EN: Wow, it's beautiful!

うわあー!

Whoa!

— One Cut of the Dead (2017)

うわあー!

Whoa!

— One Cut of the Dead (2017)

うわあー

Whoa!

— Godzilla Minus One (2023)

うわあー…

Whoa...

— 君の名は。 (2016)