to flow backwards (of water, because of flood, tide, wind etc); reverse flow; to back up (sewage)

sprinkler irrigation

spring irrigation

to irrigate; to wash with water

to water; to irrigate

to warp (fertilize land by flooding)

basin irrigation (e.g. paddy fields)

to drip irrigate

to force feed

autumn irrigation

cramming (as a teaching method); rote learning

saltwater intrusion