せねばならない

せねばならない, せねばならぬsenebanaranai

expression

  1. ought to do
  2. have to do
  3. must do
  4. feel obliged to

Study it in Yanamino

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences