Run-of-the-mill and Wishy-washy

Run-of-the-mill adjective - Being of the type that is encountered in the normal course of events.

Wishy-washy and run-of-the-mill are semantically related. In some cases you can use "Wishy-washy" instead an adjective phrase "Run-of-the-mill".

Wishy-washy adjective - Lacking in qualities that make for spirit and character.

Run-of-the-mill and wishy-washy are semantically related. Sometimes you can use "Run-of-the-mill" instead an adjective phrase "Wishy-washy".