Foam
Noun
あわ
マリファナを一服した瞬間、男は口から泡を吹いて地面に倒れ込んだ。
The moment he took a puff of marijuana, he fell to the ground foaming at the mouth.
The kanji and the word are exactly the same. That means they share meanings as well.
It's a bubble!
A Wha---? (あわ)
A BUBBLE.
A WHA???