noun, takes する, intransitive verb

  1. company, friendship, association, society, acquaintance.
  2. (romantic) involvement, dating.

Variations

Pronunciation Kanji Kana Is Common
交際 こうさい

Contained Kanji Breakdown

mingle, mixing, association
コウ -か.う まじ.わる (2nd, N3)
kettle lid radical (no. 8)
トウ (Kentei 1)
father
ちち フ (2nd, N5)
eight, eight radical (no. 12)
ハチ や はっ (1st, N5)
mow, cut grass, subdue
ガイ ゲ おさ.める (Kentei 1)
occasion, side, edge
サイ きわ わ (5th, N3)
ritual, offer prayers, celebrate
サイ まつ.る まつり (3rd, N2)
month, moon
つき ゲツ ガツ (1st, N5)
or again, furthermore, on the other hand
また ユウ やす (8th, N1)
show, indicate, point out
ジ しめ.す (5th, N3)
two, two radical (no. 7)
ニ ふた ふだ (1st, N5)
little, small
ショウ こ- ちい.さい (1st, N5)
feathered stick, barb radical (no. 6)
ケツ かぎ (Kentei 1)
eight, eight radical (no. 12)
ハチ や はっ (1st, N5)