Early 17th century; earliest use found in John Lane (fl. 1600–1630). Partly from conscient + -ly, and partly from classical Latin conscientiaconscience + -ly.
Definition of consciently in US English:
consciently
adverbˈkɒnʃntli
(A) = "consciously"; (b) = "conscientiously".
Origin
Early 17th century; earliest use found in John Lane (fl. 1600–1630). Partly from conscient + -ly, and partly from classical Latin conscientia conscience + -ly.