Calypso is both a nymph and a goddess. Nymphs were daughters of gods. The word "nymph" in Greek originally meant "bride" but later also meant "young woman." Sometimes nymphs refer specifically to dryads, or wood-nymphs; naiads, or river-nymphs; or nereids, or sea-nymphs. But in Calypso's case, as she is the daughter of Atlas and has the ability to offer Odysseus the magical gifts of immortality and eternal youth, she is both.