に[難「むずか」]くない => It's not hard to A N1
Adjectival, Descriptions
にいく => Go somewhere N4
Secondary Verb
ようになる/なくなる => Become… N3
Time, Situation
とはくらべ[物「もの」]にならない => It's no match for A N1
Comparison/ Exchange
ないと,なくちゃ => Must do A N3
Needs, Requirement
かいもなく => Even though A, N2
Contrast,Surprise
なくてもいい => Don't have to A N4
Can, Should, Must
~ないでください => Please don't do~ N5
Asking and Telling
なくてはいけない => Must do A; have to A N4
Can, Should, Must
にくい => A is hard/difficult to do N4
Verb Suffixes
そうにない => N2
Potential, Possibility
べくもない => Can't A, can't expect to A N1
Potential, Possibility