IPA: //ˌpɒlɪˈhɛdrəl//
KK: /pɑːlɪˈhɛdrəl/
Describing a shape that has many flat surfaces or faces, typically in three-dimensional space.
The artist created a stunning polyhedral sculpture that caught everyone's attention.
Polyhedral → It is formed from "poly-" (from Greek "polus", meaning many) and "hedra" (from Greek "hedra", meaning face or base). The word "polyhedral" refers to a shape that has many faces.
Think of 'many' ('poly-') faces ('hedra') to remember that 'polyhedral' describes a shape with multiple faces.