wirkst

Wirkst is the second-person singular present indicative form of the German verb wirken. It is used with the informal pronoun du and expresses either that someone has an effect or that someone appears in a certain way. The infinitive of the verb is wirken, and its other present-tense forms include ich wirke, er wirkt, wirken (1st person plural), ihr wirkt, sie wirken.

In usage, wirken covers several related senses. One sense means to have an effect or to operate: for example, Der Dünger wirkt schnell (The fertilizer acts quickly). It can also describe how something appears or feels, often in terms of impression: Du wirkst nervös (You seem nervous). In contexts referring to actions or processes, it can convey ongoing influence, as in Die Maßnahme wirkt sich positiv auf das Ergebnis aus (The measure has a positive effect on the outcome).

Wirkst is not a standalone noun or independent lexical item; it is a grammatical inflection of wirken. The related noun form is Wirkung (effect, impact), and numerous compounds use the root Wirk- (e.g., Wirkung, wirkungsvoll). The form differs from wirkt (the 3rd person singular present, er wirkt) and from wirkt in the 2nd person plural (ihr wirkt).

Usage notes: wie you address someone informally with du, the corresponding formal address uses Sie, where the present form is Sie wirken. The word can appear in questions and statements alike, and its meaning depends on context—whether describing actual effect or outward appearance.