täyttämässä

täyttämässä is a Finnish word derived from the verb täyttää, which means “to fill.” It is an adverbial form formed with the suffix –mässä. In this construction, –mässä follows the verb stem and indicates a state or action occurring while something is being filled. The form is equivalent to the English expression “while filling” or “in filling.”

Morphologically, täyttämässä is built from the root täyttä plus the participial suffix –mä, followed by the case ending –ssä, which marks the inessive (inside/within) case. Thus the word literally conveys the idea of filling “inside” or within the context of an action. It is not a noun but functions like an adverb or participial phrase that modifies verbs, adjectives, or entire clauses. For example, täyttämässä pöytää means “while filling the table” or “in filling the table,” indicating that the filling action is taking place at the same time as another action.

In written Finnish, täyttämässä is found largely in literary contexts, particularly in narratives that describe simultaneous actions. It is also used in technical or instructional prose to describe the process of filling containers or spaces, such as täyttämässä manuaalle (while filling the manual). The form is less common in everyday spoken language, where simpler constructions such as täyttäessä or täyttäessään are preferred.

Because of its grammatical role as a participial adverb, täyttämässä does not vary for gender, number, or case beyond the –essä ending, which marks the inessive case. In compounds, it can appear as part of longer phrases that describe the filling action in more detail, for example täyttämässä kupla (while inflating the balloon). The word is considered standard in contemporary Finnish, and it follows the productive patterns of participial formation that characterise many Finnish verbs.