不速之客 bù sù zhī kè

DEFINITIONS

  1. uninvited or unexpected guest

CHARACTERS

不 bù
HSK 1
no, not; un-; negative prefix
速 sù
HSK 4
quick, prompt, speedy
之 zhī
HSK 4
marks preceding phrase as modifier of following phrase; it, him her, them; go to
客 kè
HSK 1
guest, traveller; customer