に行く/に来る/に帰る => go/arrive/go back (to do something) N5
以来 => since; henceforth ~ N2
へ => Go to N, head to N , Often followed by verbs like 行く/いく, 来る/くる, 向かう/むかう… N5
Particles
て[以来「いらい」] => After A, B (continuous action/condition N2
Information, Report
にくい => difficult to do ~ N4
にいく => Go somewhere N4
Secondary Verb
おくに => Which country N5
Doubt
にくい => A is hard/difficult to do N4
Verb Suffixes
~にもなく => ~different from N1
Compare
~になく => different from usual N1
Exception
ろくに~ない => not well; not enough; improperly; insufficiently; unsatisfactorily ​~ N2
~にかたくない      => easy to do; it's not hard to ~ N1