MEANING: noun: 1. A mysterious, imaginary animal.
2. Something or someone hard to track down.
3. A snide remark.
verb intr.: To make a snide remark.

ETYMOLOGY: For noun 1, 2: Coined by Lewis Carroll in the poem The Hunting of the Snark in 1876. Earliest documented use (outside the poem): 1879.
For noun 3, verb: Of imitative origin, formerly used in the sense to snore or snort. Earliest documented use: 1866.

U.S.N. ARK - a US navy vessel for sheltering couples

SIN-ARK - an trigonometry inverse function

SNARY - trappily frightful