Washy (adjective)

Weak, diluted, or lacking in strength or effectiveness, as if washed out.

Origin:

From the noun "wash" meaning a liquid used to clean something.

Examples:

1. The coffee was weak and washy this morning.
2. The colors in the painting were washy and indistinct.
3. The washy light made it hard to see the details in the photograph.
4. The washy taste of the soup ruined the dish.
5. The washy performance of the actor was disappointing.