na-adjective
Archaic adjectival noun describing something as great, grand, or magnificent. Not used in modern everyday Japanese; encountered mainly in historical or literary contexts.
彼の功績はまことに豪的なものであった。
His achievements were truly magnificent.
The exact derivation is uncertain; the kanji 豪 suggests 'powerful' or 'magnificent', and 的 is a suffix forming adjectival nouns, but the combination is archaic.