Capable of having its origin and historical development studied or explained.
From etymologize + -able (American spelling). The American variant of etymologisable, standardized in the 19th century.
Some slang words become etymologizable only decades later when scholars trace them back—like discovering that 'nerd' might come from Dr. Seuss, showing how pop culture creates real words.
Complete word intelligence in one call. Free tier — 50 lookups/day.