English
existible
From exist + -ible.
Formed from exist + -ible
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 existence.
Language periods are conventional ranges, not dates for this word.
Etymograph / existible