deepness

名词 deepness:

1. the intellectual ability to penetrate deeply into ideas
   同义词：astuteness, profundity, profoundness, depth
2. the quality of being physically deep
   同义词：profundity, profoundness
3. a low pitch that is loud and voluminous

1. Her son's voice have acquired the deepness of a man.
   她儿子的声音已经有了成年男人的低沈。