noun, takes genitive case の

  1. the same age.

Variations

Pronunciation Kanji Kana Is Common
 
同い年 おないどし

Contained Kanji Breakdown

same, agree, equal
ドウ おな.じ (2nd, N4)
upside-down box radical (no. 13)
キョウ ケイ (Kentei 1)
delicious(旨) variant
one, one radical (no.1)
イチ いっ ひと- (1st, N5)
mouth
くち コウ ク (1st, N4)
year, counter for years
とし ネン ね (1st, N5)