sonorous adj.

also swenə-, Proto-Indo-European root meaning "to sound." 

It forms all or part of: assonance; consonant; dissonant; resound; sonant; sonata; sone; sonic; sonnet; sonogram; sonorous; sound (n.1) "noise, what is heard;" sound (v.1) "to be audible;" swan; unison.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit svanati "it sounds," svanah "sound, tone;" Latin sonus "sound, a noise," sonare "to sound;" Old Irish senim "the playing of an instrument;" Old English geswin "music, song," swinsian "to sing;" Old Norse svanr, Old English swan "swan," properly "the sounding bird."

Mexican state, also in reference to Native languages there, from Spanish sonora "sonorous" (from Latin sonoros; see sonorous), supposedly so called in reference to marble deposits in the rocks there which rang when struck. Related: Sonoran.

"sonorousness, resonance, the quality of giving sound when struck," 1620s, from French sonorité and directly from Latin sonoritas "fullness of sound," from sonorus "resounding" (see sonorous).