This is the 164th most frequent Dutch word.
langer
"Langer" means "longer" in English.
Here, 'langer' means 'longer', but in context with 'niet', it forms 'no longer', indicating discontinuation.
Ik kan niet langer wachten.
I can no longer wait.
In this comparative sentence, 'langer' is the comparative form of 'lang' (long), indicating length.
Deze broek is langer dan die andere.
These pants are longer than the other ones.
Here, 'langer' refers to an increase in time duration, showing a progressive increase in how long.