cipher1
 
/
ˈsʌɪfə/
n.
    - a code. ▸a key to a code. 
- dated a zero.
- an unimportant person or thing.
- a monogram.
v.
  - encode (a message).
- archaic do arithmetic.
Etymology
ME: from OFr. cifre, based on Arab. ṣifr ‘zero’.
  
    
cipher2
  
  n.
 a continuous sounding of an organ pipe, caused by a defect.
v.
 (of an organ pipe) sound continuously.
Etymology
  C18: perh. from cipher1.