Definitions of twang:

• noun:   exaggerated nasality in speech (as in some regional dialects)
• noun:   a sharp vibrating sound (as of a plucked string)
• verb:   twitch or throb with pain
• verb:   sound with a twang

  Example: "The bowstring was twanging"

• verb:   cause to sound with a twang

  Example: "He twanged the guitar string"

• verb:   pronounce with a nasal twang
• verb:   pluck (strings of an instrument)

  Example: "He twanged his bow"