[n] exaggerated nasality in speech (as in some regional dialects)
[n] a sharp vibrating sound (as of a plucked string)
[v] pronounce with a nasal twang
[v] pluck, as a string of an instrument; "He twanged his bow"
[v] twitch or throb with pain
[v] sound with a twang, as of a bowstring
[v] cause to sound with a twang; "He twanged the guitar string"