IPA: /ˈtrʌstər/
KK: /ˈtrʌstər/
A person who has confidence in someone or something, believing that they will act in a reliable or honest way.
She is a truster who believes in the goodness of people.
Truster is formed from "trust" (from Old Norse "traust", meaning confidence or reliance) and "-er" (meaning a person who). A truster is a person who has confidence or reliance in someone or something.
Think of someone who has 'confidence' ('trust') in another person — that's what a truster means.