expression, noun

Idiomatic expression.
  1. two incompatible things (or people), (going together like) oil and water.

Variations

Pronunciation Kanji Kana Is Common
 
水と油 みずとあぶら

Contained Kanji Breakdown

water
みず スイ み (1st, N5)
oil, fat
ユ あぶら ユウ (3rd, N2)
water, water radical (no. 85)
さんずい
wherefore, a reason
ユウ ユ ユイ (3rd, N3)
day, sun, Japan
ひ にっ ニチ (1st, N5)
number one, line, rod radical (no. 2)
コン シ ジョ