なければならない/なくてはならない/なければいけない/なくてはいけない/なければだめ/なくてはだめ => must N5
ないといけない / だめだ => must do; have an obligation to do ~ N4
Necessity, obligation
なりとも/せめて~だけでも => at least; even just a little (adverbial particle) N1
~んがため(に)/~んがための      => in order to ~ N1
~づめだ      => full of N1
ため => In order to, for N4
Purpose, target
めったな => hardly; rarely; seldom N2
Ban
ずくめ => completely; entirely; nothing but ~ N1
せめて => at least; at most ~ N2
ため(に) => For, because… N4
Cause and Effect
をはじめ/をはじめとする => For example, A N2
Lists, Examples
~をこめて => filled with; full of N2