Sapless and Wishy-washy

Sapless adjective - Destitute of sap and other vital juices; dry.

Wishy-washy and sapless are semantically related in tasteless topic. In some cases you can use "Wishy-washy" instead an adjective "Sapless".

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

Sapless and wishy-washy are semantically related in bland topic. Sometimes you can use "Sapless" instead an adjective phrase "Wishy-washy".