The idiom "wash down something" means to drink a liquid to help swallow something. Here are some examples to make it easy to remember this phrase.
Idiomatic Expressions: What Are They & Why Are They Important?
51 Hilarious Russian Idioms That Will Make You Giggle - The
Interpreting Figurative Language and Poetic Devices
50+ Nose Idioms with meanings and examples - Word Coach
I Am Down Meaning: Example Sentences, Responses, & More
Wash down - Idioms by The Free Dictionary
English 10 idioms and their meanings with sentences Daredevil
Figurative Language Examples: Guide to 9 Common Types
Clothing Idioms, Vocabulary
Idioms and Expressions With Make