This is the 4499th most frequent German word.
merke
"Merke" means "remember" or "note" in English.
In this sentence, 'merke' is used to express noticing or realizing something mentally.
Ich merke, dass ich etwas vergessen habe.
I realize that I forgot something.
Here, 'merke' is used as an imperative form to advise someone to remember or internalize information.
Merke dir diesen wichtigen Hinweis für die Prüfung.
Keep this important advice for the exam in mind.
In this context, 'merke' indicates perceiving or observing characteristics during an activity.