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剣， 劒， 劍， けん， つるぎ
1. sword (esp. a large, double-edged one), blade
2. bayonet
3. swordsmanship
4. stinger, ovipositor, dart
剑（尤指大型双刃剑），刀刃；刺刀；剑术；螫针，产卵管，飞镖
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
