同おない年どし

お

な

い

ど

し

JLPTN2Freq.FrequencyTop 20,000

Meanings

1

noun, noun which may take the genitive case particle 'no'

the same age

Used to say that two or more people are the same age. Often appears as 同い年だ or 同い年の.

同おない年どしUsage97%
Standard kanji spelling; the 同い reading is irregular but well-established.
おないどしUsage3%

同どう年ねん
同年 is more formal and often used in written contexts, while 同い年 is casual and conversational.
同どう級きゅう生せい
同級生 means classmate (same grade in school), not necessarily the same age.

Compound of 同い (onaji, 'same') with an irregular reading shift and 年 (toshi, 'year/age'). The reading おない is a euphonic change from おなじ.