kylmissäkin
The Finnish word "kylmissäkin" is a grammatical form. It is the essive plural form of the adjective "kylmä," which means "cold." The essive case in Finnish is used to indicate a state or condition, or to function as an adverb. Therefore, "kylmissäkin" translates to "even in the cold" or "in the cold ones as well."
This form would be used in a sentence to describe a situation where something persists or exists