This is the 1114th most frequent Dutch word.
merkt
"Merkt" means "notices" or "observes" in English.
In this sentence, the word 'merkt' means 'notices' or 'realizes', referring to the observation of a change in temperature.
Hij merkt dat het buiten kouder wordt.
He notices that it is getting colder outside.
Here, 'merkt op' translates to 'remarks' or 'points out', showing active recognition made verbally.
Maria merkt op dat iedereen aanwezig is.
Maria remarks that everyone is present.
In this context, 'merkt' is used to express 'detects', meaning becoming aware of a problem or irregularity.