disserve

Old French desservir, from Latin dis- (“indicating negation”) + servīre (“to serve”).

disserve (third-person singular simple present disserves, present participle disserving, simple past and past participle disserved)

1. To treat poorly; to do a disservice to
   • 1988 August 12, Michael Miner, “Cop and Writer; Manhandling the Sun-Times”, in Chicago Reader‎:

     They are an excellent group of journalists, and over the last five years the executives manhandling their newspaper have disserved them at every turn.

• dervises, devisers, dissever

disserve

1. third-person singular present indicative of disservire