Did you know the opposite of eloquent is pauciloquent
"Uttering few words; brief in speech."
More '-quents':
falsiloquence - deceitful speech
flexiloquent - speaking ambiguously or using words of doubtful
meaning
inaniloquent - prone to foolish or empty babbling
mendaciloquence - lying speech
Also good to know: sialoquent - spitting greatly while speaking.