念には念を入れる

ねんにはねんをいれるnennihanenoireru

expression · ichidan verb

  1. to be extremely cautious
  2. to be as sure as sure can be
  3. to make assurance doubly sure

Kanji in this word

Study it in Yanamino

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