Insipid • Lukewarmness • Tepid
Nelson’s New Illustrated Bible Dictionary
LUKEWARM — mildly warm; neither hot nor cold; lacking in conviction. Jesus condemned the church at Laodicea because of its lukewarm faith and declared that He was about to spew them out of His mouth (Rev. 3:14–22). Lacking the courage to follow God or to rebel against Him, they were disgusting to Him.
Holman Illustrated Bible Dictionary
LUKEWARM Tepid; neither hot nor cold (Rev. 3:16). The city of Laodicea received its water from an aqueduct several miles long. The lukewarm water that arrived at the city served as an appropriate illustration for a tasteless, good-for-nothing Christianity.