How the word "おとうさん（お父さん）" is translated into English
お父さんはどこで働いていますか。
お父さん、おかえり！
お父さんにネクタイをあげました。
"おとうさん（お父さん）" is in the lesson "Family 1" (Level 1), along with 12 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.
