Where does “conscientious” come from?

Conscientious comes from Middle French conscientieux, from Latin conscientiosus, derived from Latin conscientia meaning awareness or knowledge of one's own thoughts, ultimately formed from Latin cum meaning with and the abstract noun suffix -ia.

conscientious (English): Thorough, careful, or vigilant in one’s task...

Definitions

  1. Thorough, careful, or vigilant in one’s task...

Ancestry of “conscientious”, step by step

StepLanguageWordMeaning
1Middle Frenchconscientieuxconscientious
2Latincōnscientiōsus
3Latincōnscientiaknowledge shared with others, being in the know or privy to, joint knowledge; complicity
4Latinconscirepresent active infinitive of cōnsciō; to know, to...
5Latincom-allomorph of con-
6Latincon-Used in compounds to indicate a being or bringing...
7Latincumwith, along with; at; -fold
8Old LatincomAlternative form of cum
9Proto-Italickomwith, along, at
10Proto-Indo-Europeanḱómbeside, near, by, with
11Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
12Middle Englishkyt
13Germankittputty certain kinds of cement used for fixing e.g. window panes
14Old High Germankuti
15Proto-West Germanickwidugum, resin
16Proto-Germanickweduzresin
17Proto-Indo-Europeangʷet-resin, gum; to say, speak
18Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

Words derived from “conscientious

Every word from Proto-Indo-European gū-