English
existable
From exist + -able.
Formed from exist + -able
Proto-Indo-European *steh₂- ‘to stand’
…
Proto-Italic *sistō
Latin sistō ‘to cause to stand; to set’
Latin exsistō ‘to arise, emerge; to exist’
French exister
English exist
Today it means
adj Capable of existing; feasible.
Language periods are conventional ranges, not dates for this word.
Etymograph / existable