supervacaneous
Added above what is needed or necessary; superfluous, redundant.
archaic
It is an awful thing to find your efforts supervacaneous when you are so far away from home and friends, sympathy, and help.
Where it comes from
From Latin supervacāneus; compare Italian supervacaneo, Portuguese supervacâneo, Spanish supervacáneo.
Adapted from the Wiktionary entry supervacaneous (CC BY-SA 4.0).