vihastua
Vihastua is a Finnish intransitive verb meaning "to become angry" or "to get upset." It describes a change of emotional state and is commonly used in everyday speech. Typical conjugation patterns include vihastun, vihastut, vihastuu (present) and vihastuin, vihastuit, vihastui (past). A passive form vihastutaan conveys a general or impersonal sense ("one gets angry").
The verb frequently appears with expressions indicating the cause or target of the anger: vihastua jostakin
Etymologically vihastua is derived from the root viha with the verbalizing suffix -stua, forming a word that