ukoy

Etymology 1
Compare,.

Noun

 * 1) a merman; either portrayed as having a human body and a tail of a fish or having an appearance similar to a kappa

Etymology 2
After the ukoy's habit of stealthily observing and approaching its victim.

Verb

 * 1) to watch a person or prey stealthily
 * 2) to sneak up on a person or prey