English
exessive
From ex- (“out of”) + essive.
The story
According to linguist Tiit-Rein Viitso, the case was originally called the excessive (derived from Latin excessus (‘departure’)), which would make the spelling exessive a case of folk etymology.folk etymology The source marks this as unproven or a folk etymology. Quoted, not asserted.
Today it means
adj Of, or relating to the grammatical case that in some languages indicates the transition away from a state.
Language periods are conventional ranges, not dates for this word.
Etymograph / exessive