IPA: /ˈsʌmənər/
KK: /ˈsʌmənər/
A person who calls upon or brings forth something, often in a magical or supernatural context.
The summoner called forth a powerful spirit to aid in the battle.
Summoner → It is formed from "summon" (from Old French *somon*, meaning to call or send for) and "-er" (meaning a person who). A summoner is a person who calls or sends for someone, often in a legal or formal context.
Think of someone who 'calls' ('summon') others to come — that's what a summoner does.