nitrifies is nitrify's Simple Present

nitrify

US 
UK 
  • v.【化】硝化;(使)变成硝石
  • Web渗氮;氮化;使硝化
Past Participle:nitrified  Present Participle:nitrifying  Simple Present:nitrifies  
v.
1.
【化】硝化;(使)变成硝石