遣らずもがな

やらずもがなyarazumogana

expression

  1. needn't be done
  2. as well not to do
  3. shouldn't have been done

Kanji in this word

Study it in Yanamino

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