transitive verb
1. : to move or carry downward by action of water or other liquid ; specifically : to facilitate the passage of (food) down the gullet with accompanying swallows of liquid
bolted a hot dog and washed it down with soda
2. : to wash the whole length or extent of
washed down and scrubbed out with disinfectant, making sure that no corners or grooves … are missed out — Henry Wynmalen