piaf·fer 
(pyăfər)
(pyăfər)n.
A movement in which a horse trots in place with high action of the legs.
[French, from piaffer, to strut, piaffe.]
- under cover
- undercover
- undercroft
- undercurrent
- undercut
- underdeveloped
- underdevelopment
- underdo
- underdog
- underdone
- underdrawers
- underdress
- underdrive
- undereducated
- underemphasis
- underemphasize
- underemployed
- underemployment
- underendowed
- underestimate
- underestimation
- underexpose
- underexposure
- underfeed
- under fire