IPA: /dɪˈkɛrətɪv/
KK: /dɪˈkɔrətɪv/
Used to describe something that is intended to make a place or object look more attractive or beautiful, often through design or embellishment.
The decorative pillows on the couch added a pop of color to the room.
Decorative is formed from "decorare" (meaning to adorn or embellish) and the suffix "-ive" (meaning having the nature of). The word "decorative" refers to something that has the nature of adorning or embellishing.
Think of something that is meant to 'adorn' or 'embellish' — that's what 'decorative' means.