Full of flaws; having many imperfections or defects.
From 'flaw' plus the suffix '-ful' (from Old English '-full'), meaning 'full of'. This word follows the standard English pattern for creating adjectives describing abundance or fullness of a quality.
While 'flawful' is grammatically correct, English speakers almost never use it—we prefer 'flawed' instead, which shows how language doesn't always take the logical path even when it could!
Complete word intelligence in one call. Free tier — 50 lookups/day.