を[余儀「よぎ」]なくされる => Must do A N1
Will, Decision, Doing
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
といい~といい => Based on A and B, considering A and B N1
Reason, Result, Response
ずにはいられない/ないではいられない => Can't help but A; A is unavoidable N2
Will, Decision, “Doing”
といえば/というと/といったら => N3
Considering, Concerning
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
[命令「めいれい」] => Do A (command) N4
Can, Should, Must
かい => Really? N4
Sentence Endings
~ないでください => Please don't do~ N5
Asking and Telling
くらいだ/ぐらいだ => Around/about N5
Amount
せいで/せいか => Because of A, B N3
Reason, Result, Response
に[相違「そうい」]ない => No doubt N2
Information, Report