Telemarketer (noun)

A person who makes telephone calls to prospective customers to solicit sales.

Origin:

From tele- + marketer.

Examples:

1. She works as a telemarketer during the day.
2. He was disturbed by the telemarketer during his dinner.
3. The telemarketer was trying to sell the new product.
4. The telemarketer was persistent in her sales pitch.
5. Many people find telemarketing calls to be annoying.