notadictionary.com
夏休み勉強しなすぎて筆箱にカビ生えたんだけど
→ “I studied so much during summer break that mold grew in my pencil case, you know?”
夏休み natsuyasumi = summer vacation (noun)
夏 natsu = summer
休み yasumi = holiday / rest
勉強 benkyou = study / studying (noun/verb stem)
勉 ben = exertion / effort
強 kyou = strength / power
し shi = do (v. auxiliary)
なさ nasu = too much / excessive (adjective root)
ぎ gi = suffix for intensification (suffix)
て te = and then / result particle (particle)
筆箱 fudebako = pencil case (noun)
筆 fude = brush / pen
箱 hako = box
に ni = in / at (location particle)
カビ kabi = mold / mildew (noun)
生えた haeta = grew / sprouted (v. past tense)
ん n = emphasis / explanation particle (sentence-ending particle)
だ da = is / am (copula verb)
けど kedo = but / however / context setter (conjunction)
