Yes, it's very rude. Calling someone a coward is not okay.
Tagalog word for coward: duwag
The robber was a coward to rob the store.
Because he was rude and a coward and was always arguing with his mother and disagreeing with his father.
The word 'coward' derives from the Latin 'cauda' (a tail), via Old French 'couard'.
hero
Such a person is usually called a 'coward'.
First syllable.
That boy was a coward, and wouldn't say the things he thought about me to my face.
I don' think that there is a slang word for rude.
None but a base coward would turn from the fight before us.
It is a noun and an adjective.
cow