后掩蔽 hòu yǎn bì

DEFINITIONS

  1. backward masking

CHARACTERS

后 hòu
HSK 1
queen, empress, sovereign; (simp. for 後) behind, rear, after
掩 yǎn
HSK 6
to cover (with the hand); shut, conceal; ambush
蔽 bì
HSK 6
cover, hide, conceal; shelter