almibarar

Literally to coat something in syrup (almíbar) — almibarar fruta — but just as often used figuratively for speech that's overly sweet, flattering, or ingratiating: palabras almibaradas, a well-known fixed expression for honeyed, manipulative talk.

• Almibararon la fruta para conservarla más tiempo. — They coated the fruit in syrup to preserve it longer.
• No le creas, siempre te almibara con cumplidos antes de pedirte algo. — Don't believe him, he always sweet-talks you with compliments before asking for something.
• Sus palabras almibaradas no engañaron a nadie en la reunión. — His syrupy, flattering words didn't fool anyone at the meeting.

Missing the figurative sense — almibarar isn't only a cooking term; describing someone's speech or manner as almibarado/a is a very common way to call it excessively sweet or insincerely flattering.

• expression Palabras almibaradas — A well-established fixed expression for excessively sweet, flattering language, often used with a manipulative undertone — 'to soften with art and sweetness,' typically to win someone over or get something from them.