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consciousness

/ˈkɑnʃəsnəs/

Awareness of oneself, surroundings, or mental states

From Latin conscious (Aware).

noun
conscious
Latin
con-scius
Knowing or aware; literally associated with knowing
Latin
conscīre
To be mutually aware or know thoroughly, from con- “with, together” + scīre “to know”
English, c. 1600
conscious
Aware, privy to; later especially aware inwardly or of a fact
English, 1630s
consciousness
Conscious + -ness, initially “internal knowledge”
English, 1670s
consciousness
State of being aware of what passes in one’s own mind
English, 1746
consciousness
State of being aware of anything generally
English, 1968
consciousness-raising
Attested in the sense of increasing awareness, especially social or political awareness
Modern English
consciousness

A Roman who was conscius was not merely awake; he was “knowing with” someone, or perhaps knowing something thoroughly. The word was built from Latin con-, “with,” and scīre, “to know”—the same scīre that eventually gives English science, so consciousness and science are distant linguistic relatives. English adopted conscious around 1600, first with the rather intriguing sense “privy to,” including awareness of wrongdoing; by the 1630s, consciousness meant “internal knowledge.” Philosophers later made the word carry an enormous suitcase: in 1670s English it concerned the contents of one’s own mind, while by 1746 it could mean awareness of anything at all. The next time you notice your own thoughts noticing the world, you are standing inside a word whose oldest image is not solitary reflection but knowledge held together.

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