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1. Origins, structure, and basic meaning

• Structure: 抜 has 7 strokes and the on-reading ばつ. 抜く (ぬく) and 抜ける (ぬける) distinguish removing something from something coming out.
• Basic usage: 抜く is transitive, as when pulling weeds or removing books; 抜ける is intransitive and can describe something coming out or passing through a route.

2. Common pitfalls and similar expressions

• Quantities removed and a route passed through
  • 本を数冊抜いた means removed several books. 櫛の歯が一本抜けた means that one tooth came out of a comb.
  • 細い路地を抜けると appears where emerging from a narrow alley brings the sea into view. With 抜ける, を here marks the route passed through.