素不相識 sù bù xiāng shí

DEFINITIONS

  1. to be total strangers (idiom)

CHARACTERS

素 sù
HSK 5
white (silk); plain; vegetarian; formerly; normally
不 bù
HSK 1
no, not; un-; negative prefix
相 xiāng
HSK 3
mutual, reciprocal, each other
識 shí recognize, understand, know