verb (v)

• become louder

  menjadi keras

  Example:
  The room loudened considerably.
  

  Antonym:
  hush, pipe down, quiesce, quiet, quiet down, quieten
  

  source: wordnet30
• cause to become loud

  menyebabkan melantang

  Antonym:
  hush, hush up, quieten, shut up, silence, still
  

  source: wordnet30