Having the nature of or relating to aroma; fragrant or possessing a distinctive and usually pleasant smell.
From 'aromatic' plus the suffix '-al,' creating a doubly-suffixed form. This represents an older, more Latinate way of building adjectives that's now mostly archaic in favor of the simpler 'aromatic.'
Words like 'aromatical' show how English once had more adjectival variation—we could say 'aromatic' or 'aromatical' just like we once could say 'fatal' or 'fatical'—but we've streamlined to single forms, making modern English simpler but less flexible.
Complete word intelligence in one call. Free tier — 50 lookups/day.