IPA: /ˈwiːldər/
KK: /ˈwiːldər/
A person who holds and uses a tool, weapon, or power.
The wielder of the sword was skilled in combat.
Wielder → It is formed from "wield" (from Old English "wieldan", meaning to control or handle) and "-er" (meaning a person who). A wielder is a person who controls or handles something, often a tool or weapon.
Think of someone who 'controls' or 'handles' something — that's what a wielder does.