käynnistyy

Käynnistyy is a Finnish verb form meaning “starts” or “is starting up.” It is commonly used to describe the moment a device, program, system, or vehicle begins operating after being turned on or activated. The expression is frequent in technical writing, manuals, and everyday language when referring to processes that begin automatically or as a result of a user action.

Grammatically, käynnistyy is the present tense, third-person singular form of the verb käynnistyä. Käynnistyä is intransitive, so the subject of the sentence is the thing that begins to function. Examples include: “Tietokone käynnistyy automaattisesti” (The computer starts up automatically) and “Laitteen ohjelmisto käynnistyy, kun virta palautuu” (The device’s software starts up when power returns).

Related forms include käynnistää, a transitive verb meaning “to start (something),” and the nouns käynnistys (the act of starting or booting) and käynnistyminen (the process of starting up). These terms are common in discussions of hardware, software, and machinery behavior, and they help distinguish between the action of initiating a start (käynnistys) and the ongoing process of starting up (käynnistyminen).

Notes on usage: käynnistyy typically describes the subject beginning operation without specifying an actor; if a person initiates the start, the active form käynnistää might be used. The term is neutral and widely understood across Finnish-speaking contexts.