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殺す， ころす
1. to kill, to slay, to murder, to slaughter
2. to suppress, to block, to hamper, to destroy (e.g. talent), to eliminate (e.g. an odour), to spoil (e.g. a flavour), to kill (e.g. one's speed)
3. to suppress (a voice, feelings, etc.), to hold back, to...
杀戮，屠戮，谋杀，屠杀；典当，抵押；压制、阻挠、妨碍、摧毁（如才华）、消除（如气味）、破坏（如风味）、扼杀（如速度）
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
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd
