Japanese wordそうなんだIn your course · Chapter 11Part of speechphraseLevelA2Meaningsoh, I seeSource: Tonada courseRelated wordsいくつhow many (things)いっさいone year oldうんyeah (casual yes)おいくつhow old (polite)かぞくfamilyことしthis yearさいyears oldさんさいthree years old