füllst

füllst is the second-person singular present tense form of the German verb füllen. Füllen means to fill, as in making a container contain a substance or to complete a space. The form "füllst" is used with the informal pronoun du.

In present tense, the full conjugation of füllen is: ich fülle, du füllst, er/sie/es füllt, wir füllen, ihr füllt, sie füllen. Therefore, "du füllst" translates to "you fill."

Usage: Füllen requires a direct object in the accusative and often a material or source phrase, such as mit Wasser. Examples: "Du füllst die Flasche mit Wasser." "Du füllst die Lücke im Text." These sentences illustrate filling a container and filling a gap, respectively.

Related forms: Befüllen means to fill something up, and nachfüllen means to refill or top up. The noun related to the action is Füllung (filling); Füller can mean a filler or a fountain pen.