illustrate + -able, imitating a pattern of omitting -ate when adding -able, a pattern probably derived from words derived from Latin adjectives that are derived from Latin verbs which entered English via a form derived from the past participle.
Modern English dictionary
Explore and search massive catalog of over 900,000 word meanings.
Word of the Day
Get a curated memorable word every day.
Challenge yourself
Level up your vocabulary by setting personal goals.