pysähtyit
Pysähtyit is a Finnish verb form that is most commonly described as the second-person singular past tense of the verb pysähtyä, meaning “to stop” or “to come to a stop.” In standard Finnish, the familiar past tense form for you is pysähdyit; pysähtyit is not generally listed as the normative form in dictionaries and is often considered a misspelling or nonstandard variant.
The form would be used in direct address to describe that the listener stopped at a past
Pysähtyä is a verb with a typical set of personal endings in the past tense: minä pysähdyin
The word is formed from the verb pysähtyä, with typical past-tense endings applied to the second-person singular.