"cleanse from infection, destroy the germs or disease in," 1590s, perhaps from French désinfecter (16c.), or formed in English from dis- + infect. Related: Disinfected; disinfecting.
disillusionment
disincentive
disinclination
disincline
disindividualize
disinfect
disinfectant
disinformation
disingenuous
disinherit
disinhibition