abstinent       
adjective uk/ˈæb.stɪ.nənt/ us/ˈæb.stə.nənt/
 禁欲的
completely avoiding something such as alcohol or sex
  sexually abstinent 禁性欲的 
 He has now been abstinent from alcohol for four years. 到现在他戒酒四年了。 
 - More examples
 - I choose to be abstinent and will wait to have sex until after I am married.
 - He is totally abstinent at conferences because he wants to stay focused.
 - Unless you are completely abstinent, there is no other 100% perfect method of birth control.
 
See: abstinence