This is the 14199th most frequent German word.
grüßen
To greet.
Here, 'grüßen' is used in the present tense, indicating an action of greeting someone actively.
Ich grüße meinen Freund.
I greet my friend.
In this sentence, 'grüßen' is used in the infinitive form, suggesting a recommended or customary action.
Beim Verlassen des Hauses sollte man die Nachbarn grüßen.
When leaving the house, you should greet the neighbors.
Here, 'grüßen' is in the present perfect (past tense) form, referring to a completed action of greeting.