senility [sə'nɪlətɪ]

例句:

• The old man was showing unmistakable signs of senility.
  老人已老态毕现。
  
• He is yet in green vigorous senility.
  他老当益壮.
  
• The future may provide an anti - senility pill.
  将来或许会有一种 抗 衰老药片.
  
• I wonder whether old-age senility has something to do with this.
  来自SA
• Some call it greed, others call it senility and others still, call it a middle finger to their children.
  来自BBC
• Perhaps senility results from an aging brain's increasing inability to maintain a firm boundary between sleep and wakefulness.
  来自SA