IPA: /ˈtɔːkər/
KK: /ˈtɔːkər/
A person who speaks or talks a lot, often in a chatty or talkative manner.
She is a great talker and can keep a conversation going for hours.
Talker → It is formed from "talk" (from Old English *tælcian*, meaning to speak or converse) and "-er" (meaning a person who). A talker is a person who speaks or engages in conversation.
Think of someone who 'speaks' ('talk') — the '-er' just means a person. A talker is someone who engages in conversation.