► 名詞
やんちゃ [やんちゃ] meaning: naughty rank: 3
☆ やんちゃ坊主 ⇨ A naughty rascal (☛ Usually about boys)
悪さ [(1)わるさ] [coll] meaning: naughty rank: 4
☆ うちの息子は悪さばかりする ⇨ My son does all kinds of naughty stuff (☛ Naughty acts by little kids)
► 形容動詞
腕白 [わんぱく] meaning: naughty rank: 4
☆ うちの息子は大変な腕白だ ⇨ My son is very naughty (☛ Usually about pre-teen boys)