ancillary (adj.) Look up ancillary at Dictionary.com
"subservient, subordinate, serving as an aid," 1660s, from Latin ancillaris "relating to maidservants," from ancilla "handmaid," fem. diminutive of anculus "servant," literally "he who bustles about," from root of ambi- "about" (see ambi-) + PIE *kwol-o-, from root *kwel- (1) "move round, turn about, be much about" (see cycle (n.)).