사족

Etymology 1
, with the implication that it is as unnecessary as drawing feet on a picture of a snake. Originally a Chinese chengyu, from a story in the ancient Chinese history , see for more.

Noun

 * 1) something superfluous, unnecessary

Etymology 2
.

Noun

 * 1)  four legs, four feet
 * 2)  four limbs, arms and legs
 * 1)  four limbs, arms and legs

Etymology 3
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Noun

 * 1)  a powerful aristocratic family or a scion of such a family