摸不着边 mō bu zháo biān

DEFINITIONS

  1. irrelevant
  2. can't make head or tail of

CHARACTERS

摸 mō
HSK 5
gently touch with hand; caress
不 bu
HSK 1
no, not; un-; negative prefix
着 zháo
HSK 2
make move, take action
边 biān
HSK 2
edge, margin, side, border