tirskahdus
tirskua
A partly suppressed or broken laugh.
(RQ:Grahame Wind in the Willows)
A sly or snide laugh.
To emit a snigger.
{{quote-text|en|year=1908|author=Kenneth Grahame|title=The Wind in the Willows|page=22
(RQ:Travers Cuckoo in the Nest)