屢試不爽 lǚ shì bù shuǎng

DEFINITIONS

  1. well-tried
  2. time-tested

CHARACTERS

屢 lǚ frequently, often, again and again
試 shì test, try, experiment
不 bù
HSK 1
no, not; un-; negative prefix
爽 shuǎng
HSK 6
happy, cheerful; refreshing