syttyy

Syttyy is a Finnish verb, the present tense third-person singular form of syttyä, meaning to catch fire or to ignite. It describes events in which something becomes lit, such as a lamp or a fire, and it can also be used figuratively to indicate that a situation begins to flare up or intensify.

Typical usage is intransitive, with no direct object: Lamppu syttyy, kun kytkin on päällä. Tuli syttyi eilen illalla. In figurative uses, the expression tilanne syttyy or keskustelu syttyy can describe a dispute or debate that suddenly heats up.

Related forms in the syttyä verb family include syttyminen (the act of ignition) and other inflected forms of syttyä. The term is common in standard Finnish and appears in everyday speech, media reporting, and literature.