From Latin 'conscius' (knowing with), consciousness emerged in the 1630s as philosophy needed a word for subjective inner awareness.
The state of being aware of and responsive to one's surroundings; the totality of one's thoughts, feelings, and perceptions.
Derived from the Latin 'conscientia,' itself from 'conscius' (knowing with others, privy to), formed from 'con-' (together, with) and 'scire' (to know). The Latin 'conscius' originally carried a social meaning — shared knowledge or complicity — before shifting toward internal self-awareness. The English noun 'consciousness' was coined in the 1630s by adding the suffix '-ness' to 'conscious,' which had entered English in the late 16th century. The philosophical sense of subjective inner
The word 'consciousness' did not exist in English before the 1630s. Ancient Greek and Latin had no single equivalent term — the concept of a unified subjective inner experience was largely a product of early modern European philosophy, particularly Descartes and Locke.