lisäilemällä

Lisäilemällä is a Finnish grammatical form derived from the verb "lisätä," which means "to add." Specifically, it is the adessive case of the third infinitive of the verb. This form is used to indicate the manner or means by which an action is performed, often translated as "by adding," "by doing something," or "through adding."

The construction typically involves the verb stem of "lisätä," followed by the infinitive ending "-ä" and then the adessive case ending "-lle." For example, "lisäilemällä" can be used in a sentence like "Hän oppii kielen lisäilemällä uusia sanoja sanakirjaan," which translates to "He learns the language by adding new words to the dictionary."

This grammatical structure emphasizes the ongoing or repeated nature of the action of adding. It suggests that the learning process, in the example, is achieved through continuous addition of vocabulary. The adessive case here functions adverbially, describing how the main action (learning) takes place. It is a common way to express the method or process behind an outcome in Finnish.