First, a naiad is a water nymph in Greek myth—a woman who looked over the waterways.
If you look in the dictionary today, it says “naiad: any skillful female wimmer.”
The naiad willow, arching lowland brooks, speaks as water, very secretly.
Why it is thus, one knows in heaven above: But, a poor naiad, I guess not.
She vanished like a naiad startled by the approach of a mortal.
Not so Aimée; her pencil had been busy all the while, but there was no naiad on her page.
The next morning our signal was made to pass within hail, and the captain of the naiad inquired how I was.
For a fortnight we cruised without seeing any vessel but the naiad.
Close beneath, a little fountain rose in slender diamond threads, and fell again with a soft trickling, like a naiad's sigh.
Bit of a lake; bathing-shed; the naiad's bower: pretty water to see.'
"water nymph," c.1600, from Latin Nais, Naias (genitive naiadis), from Greek Naias (plural Naiades) "river nymph," from naiein "to flow," from PIE *naw-yo-, suffixed form of root *(s)nau- "to swim, flow, let flow" (see nutriment). Dryden used the Latin singular form Nais, and the plural Naiades is attested in English from late 14c.