— Merriam-Webster, Daily Prompt
unctuous Adjective | UNK-choo-us Excessively or ingratiatingly flattering; oily.
— Merriam-Webster, Daily Prompt
Use "unctuous" in a new journal entry.
Context
Used in a sentence: The unctuous tone of the salesman made her immediately suspicious.
Journaling prompt: Write about a time you trusted your gut about someone’s insincerity.