coward
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noun
a person who lacks the courage to do or endure dangerous or unpleasant things.
⦅非難して⦆ 臆病[卑怯(ひきょう)]者 (!時に呼びかけで)
adjective
1. literary excessively afraid of danger or pain.
2. Heraldry (of an animal) depicted with the tail between the hind legs.
ORIGIN
Middle English: from Old French couard, based on Latin cauda ‘tail’, possibly with reference to a frightened animal with its tail between its legs, reflected in coward (sense 2 of the adjective) (early 16th century).