(ころ)

ころす
verb (godan)
to kill
1. to kill
To cause death.
(むし)(ころ)す。
To kill an insect.
時間(じかん)(ころ)す。
To kill time.
Idiomatic expression
病気(びょうき)がその(ひと)(ころ)した。
The illness killed that person.
(ころ)すつもりはなかった。
I didn't intend to kill.
(きん)(ころ)(くすり)
Medicine that kills germs.
2. to suppress, to deaden
To restrain or hold back.
(こえ)(ころ)して()く。
To cry silently (suppressing one's voice).
(いき)(ころ)して()った。
I waited holding my breath.
感情(かんじょう)(ころ)して(はな)した。
I spoke suppressing my emotions.
個性(こせい)(ころ)してはいけない。
You shouldn't suppress your individuality.
足音(あしおと)(ころ)して(ある)く。
To walk silently (suppressing footsteps).

(ころ)す is a transitive godan verb with both literal and figurative meanings.

TRANSITIVITY:
他動詞(たどうし) (transitive) - takes を for the object.

LITERAL MEANING (Sense 1):
To kill, cause death. Used for people, animals, insects, bacteria, etc.

FIGURATIVE MEANING (Sense 2):
To suppress, deaden, or restrain something.

COMMON EXPRESSIONS:

  • 時間(じかん)(ころ)す: to kill time
  • (こえ)(ころ)す: to suppress one's voice
  • (いき)(ころ)す: to hold one's breath
  • 感情(かんじょう)(ころ)す: to suppress emotions

RELATED WORDS:

  • 殺人(さつじん): murder, homicide
  • (ころ)される: to be killed (passive)