欠かせない

かかせないkakasenai

expression · i-adjective

  1. indispensable
  2. vital
  3. fundamental
  4. imperative
  5. crucial
  6. critical

Kanji in this word

Study it in Yanamino

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