眼中钉 yǎn zhōng dīng

DEFINITIONS

  1. a thorn in one's side

CHARACTERS

眼 yǎn
HSK 2
eye; eyelet, hole, opening
中 zhōng
HSK 1
central; center, middle; in the midst of; hit (target); attain
钉 dīng
HSK 6
nail, spike; pursue closely