ärsyttää

Etymology
From. The change from -t- to -s- is dialectal variation and unexplained; the expected form, ärryttää is found in dialects and can be seen in cognates like 🇨🇬, 🇨🇬 and 🇨🇬.

Verb

 * 1) to irritate, annoy mentally and/or physically; to bother, exasperate, rub someone the wrong way
 * 2) to tease, harass, hector
 * 3)  to stimulate