tiss

Not valid in Scrabble

It's a recognised English word, but it isn't in the official NASPA Scrabble word list.

Definition of tiss

1 sense · 1 part of speech

verb

(nonce-word)To make a hissing sound.

“He ran along the edge, quickening at the shout of the kennel-boy, and had almost reached the island’s tail when Bite’m pinned him in the shoulder. Tissing through his open mouth, Tarka rolled and fought with the terriers.”
“His psalms were sung to the tissing larch, his hymns to the purple heath.”

Definitions from Wiktionary, CC BY-SA.