底知れぬ

そこしれぬsokoshirenu

expression · noun or verb acting prenominally

  1. bottomless
  2. unlimited
  3. immeasurable
  4. inexhaustible

Kanji in this word

Study it in Yanamino

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