Imbecilic and Wishy-washy

Imbecilic adjective - Having a mental age of three to seven years.

Wishy-washy and imbecilic are semantically related. In some cases you can use "Wishy-washy" instead an adjective "Imbecilic".

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

Imbecilic and wishy-washy are semantically related. Sometimes you can use "Imbecilic" instead an adjective phrase "Wishy-washy".