Lukewarm and Wishy-washy

Lukewarm adjective - Having or giving off heat to a moderate degree.

Wishy-washy and lukewarm are semantically related. in indifferent topic. In some cases you can use "Wishy-washy" instead an adjective "Lukewarm".

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

Lukewarm and wishy-washy are semantically related. Sometimes you can replace term "Lukewarm" with "Wishy-washy", this terms are similar.