Coward

"Coward

Etymology – From Old French coart, cuard, from coe (“‘tail’”)

The reference seems to be to an animal “turning tail”,
or having its tail between its legs.

Coward (plural cowards) – A person who lacks courage.

Synonyms – chicken, gutless wonder, scaredy cat, yellow belly

Derived terms – cowardly, cowardice"

http://en.wiktionary.org/wiki/coward

"Coward

Noun – a person who is easily frightened
and avoids dangerous or difficult situations

[Latin cauda tail]
cowardly adj"

http://www.thefreedictionary.com/Coward