An onomatopoeic word describing heavy, labored breathing or wheezing (e.g., after exertion or due to respiratory trouble). Variants include zeizei and zeezee.
坂を全速力で登ったら、息がゼーゼーして止まらなかった。
After sprinting up the hill, I was gasping and couldn't stop wheezing.
子どもが風邪でゼーゼーしていたので、すぐに病院に連れて行った。
The child was wheezing from a cold, so I took them to the hospital immediately.
運動会の後、彼は胸を押さえてゼーゼー言っていた。
After the sports day events, he was clutching his chest and wheezing.