死因不明 sǐ yīn bù míng

DEFINITIONS

  1. unknown cause of death

CHARACTERS

死 sǐ
HSK 4
die; dead; death
因 yīn
HSK 2
cause, reason; by; because (of)
不 bù
HSK 1
no, not; un-; negative prefix
明 míng
HSK 1
bright, light, brilliant; clear