Use the adjective melodious to describe something that sounds like music, like a babbling brook or a little boy's soft humming.

Anything that makes a pleasant, tuneful sound can be called melodious, which makes sense when you spot the word melody in melodious. Both have a root in common, the Greek word meloidia, which means "singing, or a tune for lyric poetry." It, in turn, comes from melos, or "song."

Definitions of melodious
  1. adjective
    having a musical sound; especially a pleasing tune
    synonyms: tuneful
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    tuneless, unmelodious, untuneful
    not having a musical sound or pleasing tune
  2. adjective
    containing or constituting or characterized by pleasing melody
    “the melodious song of a meadowlark”
    synonyms: melodic, musical
    ariose, songlike
    having a melody (as distinguished from recitative)
    canorous, songful
    richly melodious
    cantabile, singing
    smooth and flowing
    dulcet, honeyed, mellifluous, mellisonant, sweet
    pleasing to the ear
    suitable for or suggestive of singing
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    unmelodic, unmelodious, unmusical
    lacking melody
Word Family

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