This is the 1730th most frequent Dutch word.
vaag
Vague; unclear or indistinct.
Here, 'vaag' is used to describe the lack of clarity in the teacher's explanation.
De uitleg van de docent was vaag en moeilijk te begrijpen.
The teacher's explanation was vague and hard to understand.
In this sentence, 'vaag' expresses an unclear memory, as the recall of reading the book isn't sharp.
Ik herinner me vaag dat ik dat boek vroeger heb gelezen.
I vaguely remember reading that book in the past.
'Vaag' is used here to indicate that his plans are not well-defined or specific, showing uncertainty or generality.