Wholehearted (adjective)

1. Given or done with complete sincerity and without reservation.
2. Completely committed, dedicated, or involved.

Origin:

From the words "whole" meaning "complete" and "hearted" meaning "having a heart or showing emotion".

Examples:

1. She gave her wholehearted support to the project.
2. He was wholehearted in his efforts to succeed.
3. She was a wholehearted supporter of the team.
4. He gave a wholehearted performance.
5. The company received a wholehearted response from the customers.