IPA: /ˈpænəpli/
KK: /ˈpænəpli/
A wide and impressive display of things, often used to describe a collection of items or a full set of ceremonial clothing or armor.
The museum showcased a panoply of ancient artifacts from different cultures.
Panoply is derived from the Greek "panoplia" (meaning full armor or complete arms), which is composed of "pan-" (meaning all) and "hopla" (meaning arms or tools). The term originally referred to a full set of armor or weapons, and has evolved to mean a complete or impressive collection of things.
Think of 'all' ('pan-') the 'arms' ('hopla') that a warrior would wear in battle, which helps you remember that a panoply is a complete or impressive collection.