Source : Webster's Revised Unabridged Dictionary (1913)

Discourteous \Dis*cour"te*ous\ (?; see {Courteous}, 277), a.
   [Pref. dis- + courteous: cf. OF. discortois.]
   Uncivil; rude; wanting in courtesy or good manners;
   uncourteous. -- {Dis*cour"te*ous*ly}, adv. --
   {Dis*cour"te*ous*ness}, n.

Source : WordNet®

discourteously
     adv : in an impolite manner; "he treated her impolitely" [syn: {impolitely},
            {rudely}, {showing bad manners}] [ant: {politely}, {politely}]