Where does “consciencelessness” come from?

consciencelessness (English) comes from English conscienceless, from English conscience, from Middle English conscience, from Old French conscience, from Latin cōnscientia, from Latin conscire, from Latin com-, from Latin con- — resin, gum; to say, speak.

consciencelessness (English): Lack of conscience

Definitions

  1. Lack of conscience

Ancestry of “consciencelessness”, step by step

consciencelessness traces back through two separate lines of ancestry.

via English conscienceless

StepLanguageWordMeaning
1EnglishconsciencelessLacking a conscience; unscrupulous or ruthless
2EnglishconscienceThe moral sense of right and wrong, chiefly as it...
3Middle Englishconscienceconscience
4Old Frenchconscienceconscience
5Latincōnscientiaknowledge shared with others, being in the know or privy to, joint knowledge; complicity
6Latinconscirepresent active infinitive of cōnsciō; to know, to...
7Latincom-allomorph of con-
8Latincon-Used in compounds to indicate a being or bringing...
9Latincumwith, along with; at; -fold
10Old LatincomAlternative form of cum
11Proto-Italickomwith, along, at
12Proto-Indo-Europeanḱómbeside, near, by, with
13Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
14Middle Englishkyt
15Germankittputty certain kinds of cement used for fixing e.g. window panes
16Old High Germankuti
17Proto-West Germanickwidugum, resin
18Proto-Germanickweduzresin
19Proto-Indo-Europeangʷet-resin, gum; to say, speak

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 gʷet-