wholehearted

American  

[hohl-hahr-tid] / ˈhoʊlˈhɑr tɪd /

adjective

1. fully or completely sincere, enthusiastic, energetic, etc.; hearty; earnest.

   a wholehearted attempt to comply.

---

wholehearted British  

/ ˌhəʊlˈhɑːtɪd /

adjective

1. done, acted, given, etc, with total sincerity, enthusiasm, or commitment

---

Other Word Forms

• wholeheartedly adverb
• wholeheartedness noun

Etymology

Origin of wholehearted

An Americanism dating back to 1830–40; whole + hearted

Example Sentences

King Charles III expressed his “deepest concerns” over the arrest of his younger brother, promising his family’s “full and wholehearted support and co-operation.”

From Salon • Feb. 19, 2026

They’re so wholehearted, so unashamed, so brazenly anti-cool that they’re irresistible.

From The Wall Street Journal • Dec. 24, 2025

They can use these monies to finance costly and protracted campaigns in many different businesses, hiring dedicated workers who will give their wholehearted attention to the difficult, time-consuming work of organizing.

From Los Angeles Times • Mar. 20, 2025

Still, even some of these successes were less wholehearted than he has sometimes touted.

From Slate • Jan. 19, 2025

These were not mere dabblings but wholehearted devotions.

From "A Short History of Nearly Everything" by Bill Bryson