deacon (n.) Look up deacon at Dictionary.com
Old English deacon, diacon, from Late Latin diaconus, from Greek diakonos "servant of the church, religious official," literally "servant," from dia- "thoroughly" + PIE *kon-o-, from root *ken- (1) "to set oneself in motion."
conation (n.) Look up conation at Dictionary.com
in philosophical use from 1836, from Latin conationem (nominative conatio) "an endeavoring, effort," noun of action from past participle stem of conari "to endeavor, to try," from PIE *kona-, from root *ken- (1) "to set oneself in motion" (see deacon).
archdeacon (n.) Look up archdeacon at Dictionary.com
Old English arcediacon, from Church Latin archidiaconus, from Ecclesiastical Greek arkhidiakonon "chief deacon;" see arch- + deacon.