Calypso
the concealing nymph
Today this word meansThe nymph who held Odysseus captive. Also a moon of Saturn.
The name comes from Greek kalyptō, to hide — "she who conceals."
The word apocalypse is its opposite: apo (off) + kalyptō (to hide), literally "an uncovering."
Worth noting
The Trinidadian music genre calypso has nothing to do with the nymph. It is thought to come from a West African language, and its etymology remains unsettled.