This is the 1979th most frequent Dutch word.
besef
Awareness or realization.
In this sentence, 'besef' is used to indicate a personal awareness or realization of a particular fact.
Ik heb het besef dat we niet genoeg tijd hebben.
I have the realization that we do not have enough time.
Here, 'besef' refers to someone's comprehension or awareness of a situation.
Zijn besef van de situatie bracht verandering.
His understanding of the situation brought about change.
In this usage, 'besef' signifies a general sense or understanding, especially the lack thereof, about something important.