

疲れて脳みそが全然働かない。
試験勉強で脳みそがパンクしそうだよ。
甘いものは脳みその栄養になるって本当?
"のうみそ(脳みそ)" is in the lesson "Body parts 1" (Level 2), along with 14 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.