Where does “incautiously” come from?

Incautiously comes from English incautious, formed with Old English -līċ (suffix meaning "like" or "in the manner of") added to English cautious, which derives from Latin cautious combined with the Latin prefix in-, ultimately tracing through Proto-Indo-European ne and oyd-.

incautiously (English): In an incautious manner; with a lack of caution

Definitions

  1. In an incautious manner; with a lack of caution

Ancestry of “incautiously”, step by step

StepLanguageWordMeaning
1Englishincautiouscareless, reckless, not exercising proper caution
2Englishin-in, into, towards, within; in, into; Used with...
3Middle Englishin-
4Old Englishin-in, into; on, upon; internal, positioned on the...
5Old Englishinin; Alternative form of inn
6Proto-West Germanic*in
7Proto-Germanicinin; into
8Proto-Indo-Europeanénin
Every word from Proto-Indo-European énEvery word from Proto-Germanic inEvery word from Proto-West Germanic *in