työskentäissä

"Työskentäissä" is a Finnish grammatical form derived from the verb "työskennellä," which means "to work" or "to be working." Specifically, it is the inessive case of the third infinitive of the verb. This form expresses that an action is happening or taking place *while* or *during* the act of working. It is often translated into English using phrases like "while working," "in working," or "during work."

The structure of "työskentäissä" is formed by taking the verb stem ("työskente-"), adding the infinitive suffix ("-ä"), and then the inessive case ending ("-issä"). This grammatical construction is used in subordinate clauses or adverbial phrases to indicate a concurrent action. For example, one might say "Hän kuunteli musiikkia työskennelläissään" which translates to "He listened to music while he was working." The possessive suffix "-än" is added to show that the working is being done by the subject of the sentence.

This specific grammatical form is characteristic of Finnish and highlights the language's ability to express complex temporal relationships within a single verb form. It is a common construction in written and spoken Finnish when describing simultaneous activities.