に行く/に来る/に帰る => go/arrive/go back (to do something) N5
~ひょうしに(~拍子に)   => the moment [A], unintentionally / inadvertently caused something to happen N1
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
おくに => Which country N5
Doubt
~にもなく => ~different from N1
Compare
~になく => different from usual N1
Exception
にくい => difficult to do ~ N4
~く/ ~にする      => to make something ~ N4
Add meaning
にいく => Go somewhere N4
Secondary Verb
とにかく => in any case, anyway N2
Innocent
に[比「くら」]べて/に[比「くら」]べ => When compared to A N3
Comparison, Exchange
に気がつく => to notice; to realize N4