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1. Origins, structure, and basic meaning

• Structure: 蓋 is read ふた, has 13 strokes, and relates to lids or covers.
• Basic usage: 蓋 is read ふた, and 頭蓋骨 is read ずがいこつ.

2. Common pitfalls and similar expressions

• 蓋 and 頭蓋骨
  • 蓋 means lid or cover.
  • 鍋の蓋を少し開けて湯気を逃がした。 means “I opened the pot lid slightly to release steam.”
  • 頭蓋骨 means skull.
  • 美術の授業で頭蓋骨の模型を素描した。 means “We sketched a model skull in art class.”