غَيِّثٌ

i. q. عَيْلَمُ مَاءٍ [i. e. Water that is beneath a stratum of rock]. (TA.) [Hence] بِيءْرٌ ذَاتُ غَيِّثٍ A well having a constant accession of water. (O, K.)

And [hence] فَرَسٌ ذُو غَيِّثٍ (tropical:) A horse that performs, (O,) or that increases [his running], (K, TA,) run after run. (O, K, TA.)