This is the 64th most frequent French word.
n
In French, "n" is not a standalone word but the 14th letter of the alphabet.
The "n" is part of the negation structure "ne ... pas" in French, where "ne" is abbreviated to "n'" before a vowel sound.
Il n'y a pas de problème.
There is no problem.
Here "n" is explained as a short form for "ne" in constructions before vowels.
C'est un mot utilisé pour abréger "ne".
It is a word used to abbreviate "ne".
The use of "n'" is within a grammatical explanation about its function in negation.