duteous[adjective]Synonyms: respectful, deferential, dutiful, regardful
 [TahlilGaran] English Synonym Dictionary ▲
 duteous adjective. 
['dju:tɪǝs] L16.[from DUTY + -OUS. Cf. BEAUTEOUS.]Characterized by the performance of duty to a superior; dutiful; obedient, subservient.
 ■   duteously adverb E19. ■   duteousness noun M17.  [TahlilGaran] English Dictionary ▲