noun / verb
shampoo
sham-POO/ʃæmˈpuː/
A liquid cleanser for hair or fabrics and its use in washing.
Shampoo lathers in the young man's wet hair.

Etymology
The word first referred to massaging the body by pressing and kneading. It later came to mean lathering and washing hair, then the soap used for that purpose.
In context
The product we know as shampoo is just shy of a century old, and washing hair with soap on a regular basis only took off
More examples
- He bought a bottle of gentle shampoo.
- The cleaner shampooed the carpet.
- Rinse thoroughly after applying the shampoo.
Forms
shampoo · shampoos · shampooed · shampooing
Similar words
- cleanser
- The broad product category.
- conditioner
- A hair treatment aimed at texture rather than cleansing.