ir·ri·gate 
(
ĭr
ĭ-g
āt
′)
v. ir·ri·gat·ed, ir·ri·gat·ing, ir·ri·gates
v.tr.1. To supply (land or crops) with water by means of pipes, sprinklers, ditches, or streams.
2. To wash out (a body cavity or wound) with water or a medicated fluid.
v.intr. To irrigate land or crops.
[Latin irrigāre, irrigāt- : in-, in; see IN-2 + rigāre, to water.]
ir′ri·gation n.
ir′ri·gation·al adj.
irri·ga′tor n.