wholehearted
definition
characterized by complete sincerity and commitment
example
Her wholehearted support for the charity event motivated everyone involved to give their best.
synonyms
sincereearnestunreserved
word origin — The word 'wholehearted' is derived from the combination of 'whole' (meaning complete or entire) and 'hearted' (referring to the heart as the seat of emotions). The term emphasizes total commitment or sincerity.