käsiini
Käsiini is a Finnish word that translates to "in my hand" or "into my hand." It is a grammatical construction in the Finnish language, specifically a form of the possessive suffix combined with a case ending. The word "käsi" means "hand," and the suffix "-ni" indicates first-person singular possession ("my"). The addition of the illative case ending, which denotes movement into something, results in "käsiini." Therefore, "käsiini" signifies that something is being placed or is already within the speaker's hand.
This word is commonly used in everyday Finnish conversation. For instance, one might say "Laita kirja käsiini"