syvällisissä
The Finnish word "syvällisissä" is the inessive plural form of the adjective "syvällinen". This adjective translates to "deep," "profound," "insightful," or "philosophical" in English. When used in the inessive case, it signifies being "in" or "within" these states. Therefore, "syvällisissä" refers to situations, thoughts, discussions, or experiences that are characterized by depth, profundity, or a high degree of insight.
For instance, one might say that someone is "syvällisissä ajatuksissa," meaning they are lost in deep thought.