ornament

ot noun

1. An element of decoration; that which embellishes or adorns.
2. A Christmas tree decoration.
3. A musical flourish that is unnecessary to the overall melodic or harmonic line, but serves to decorate or "ornament" that line.
4. (in the plural) The articles used in church services.

fe’l verb

1. To decorate. We will ornament the windows with trim to make the room seem brighter.
2. To add to. The editor ornamented his plain writing, making it fancier but less clear.