lässt

Lässt is the third-person singular present-tense form of the German verb lassen. The verb lassen is highly versatile and appears in several core constructions, including permission, causation, and the formation of certain passive or impersonal expressions.

In its sense of allowing or permitting, lässt indicates that someone lets something happen or allows someone to do something. For example: Der Lehrer lässt die Schüler früher gehen. (The teacher lets the students go home earlier.) In causative use, lassen plus an infinitive expresses having someone perform an action: Ich lasse den Bruder das Auto reparieren. (I have my brother repair the car.) Er lässt seine Freunde kommen. (He has his friends come.)

Lassen is also used with sich in reflexive constructions to form passive-like meanings or to express possibility or ability. Common examples include: Die Tür lässt sich öffnen. (The door can be opened.) Es lässt sich sagen, dass dies schwierig ist. (It can be said that this is difficult.) These expressions are frequent in both spoken and written German and often appear in evaluative or explanatory contexts.

Formally, lässt marks the present tense for er/sie/es; other forms of present tense are ich lasse, du lässt, wir lassen, ihr lasst, sie lassen. The verb belongs to the strong class with a vowel change in the du and er forms and participates in many fixed phrases and idioms. In usage, kontexts and object structures determine whether leaving, allowing, or causation is being conveyed.