Where does “unconsciousness” come from?

Unconsciousness derives from English unconscious, which combines English un- with English conscious, itself from Latin conscius meaning "aware together," formed from Latin con- meaning "with" and Latin scīre meaning "to know."

unconsciousness (English): The state of lacking consciousness, of being...

Definitions

  1. The state of lacking consciousness, of being...

Ancestry of “unconsciousness”, step by step

unconsciousness traces back through two separate lines of ancestry.

via English unconscious

StepLanguageWordMeaning
1EnglishunconsciousNot awake; having no awareness; Without directed...
2EnglishconsciousAlert, awake; with one's mental faculties active;...
3Latinconsciusconscious
4Latinconsciōto be conscious of, have on one's conscience
5Latincōn-Used in compounds to indicate a being or bringing together of several objects
6Latincumwith, along with; at; -fold
7Old LatincomAlternative form of cum
8Proto-Italickomwith, along, at
9Proto-Indo-Europeanḱómbeside, near, by, with
10Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
11Middle Englishkyt
12Germankittputty certain kinds of cement used for fixing e.g. window panes
13Old High Germankuti
14Proto-West Germanickwidugum, resin
15Proto-Germanickweduzresin
16Proto-Indo-Europeangʷet-resin, gum; to say, speak
17Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European gū-Every word from Latin cōn-Every word from Proto-Indo-European gʷet-
unconsciousness — Etymology, Origin & Word History | Etymology Explorer