Antonyms of adj mellifluous

1 sense of mellifluous

Sense 1
dulcet, honeyed, mellifluous, mellisonant, sweet -- (pleasing to the ear; "the dulcet tones of the cello")

INDIRECT (VIA melodious) -> unmelodious, unmelodic, unmusical -- (lacking melody)

Similarity of adj mellifluous

1 sense of mellifluous

Sense 1
dulcet, honeyed, mellifluous, mellisonant, sweet -- (pleasing to the ear; "the dulcet tones of the cello")
       => melodious (vs. unmelodious), melodic, musical -- (containing or constituting or characterized by pleasing melody; "the melodious song of a meadowlark")