na-adjective
passionate; enthusiastic; ardent
Describes a person, attitude, speech, or action that is full of strong emotion, zeal, or fervor. Often used for glowing praise or vehement support.
彼の熱情的なスピーチに聴衆は感動した。
The audience was moved by his passionate speech.
She enthusiastically supported the plan.
情熱的 is a near-synonym with the same meaning, but 熱情的 is less common and may sound slightly more formal or literary.
Derived from 熱情 (passion, enthusiasm) + the adjectival suffix 的 (-like). The exact historical derivation is uncertain, but the word follows a common pattern for forming adjectival nouns from abstract nouns.