前失

qiánshī
  1. (archaic) (of a horse) to suddenly loose the momentum of one's foreleg's and cause the rider to go head over heels
  2. (of a horse) to suddenly loose the momentum of one's foreleg's and cause the rider to go head over heels

Wiktionary

Entry Composition

1 前 qián
  1. front
  2. forward
  3. ahead
  4. first
  5. top (followed by a number)
  6. future
  7. ago
  8. before
  9. BC (e.g. 前293年)
  10. former
  11. formerly
=2 失 shī
  1. to lose
  2. to miss
  3. to fail
=2 失 yì
  1. alternative form of 佚 (“to ignore; indulgent”)
  2. alternative form of 逸 (yì, “to flee; to run away”)