IPA: /ˈtɛpəˌfaɪ/
KK: /tɛpəˌfaɪ/
To make something slightly warm or lukewarm.
After leaving the tea out for a while, it began to tepefy and lost its heat.
Past: tepefied
Past Participle: tepefied
This word originates from the Latin 'tepidus', meaning warm or lukewarm. The word 'tepefy' means to make something warm or to become warm.
Think of 'tepid' which means warm, and remember that 'tepefy' means to make something warm.
No commonly confused words.