'bab kha

'bab pa, bab pa, 'bab pa, bob intr. v.; ft. of 'bab pa; intr. 'bab pa, bab pa, 'bab pa intr. v.; go down, flows, to move downward, to descend; descent, calamity; cascade; to alight (from horse) [RY]

1) flow; 2) go down; 3) move downward four descend; 5) occur; 6) arrive; 7) windfall [IW]

fall, (drop, go, fall) down, descend, alight, dismount, move downward, come down from, alight, it has come down to the time of [JV]