incautious

If you're incautious, you don't worry about problems that might come up — you're a little irresponsible. An incautious person might paddle off in a kayak without putting a life jacket on.

Incautious behavior might include betting your whole paycheck on a poker game, bringing six stray dogs home, or lighting a bottle rocket and launching it from your hand. An incautious child is probably used to hearing adults calling, "Be careful!" Incautious combines the "not" prefix in- and cautious, or "careful," from its Latin root cautionem, "caution, care, or foresight."

Definitions of incautious
  1. adjective
    lacking in caution
    “an incautious remark”
    incautious talk”
    Synonyms:
    adventuresome, adventurous
    willing to undertake or seeking out new and daring enterprises
    careless
    marked by lack of attention or consideration or forethought or thoroughness; not careful
    brainish, hotheaded, impetuous, impulsive, madcap, tearaway
    characterized by undue haste and lack of thought or deliberation
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    Antonyms:
    cautious
    showing careful forethought
    unadventurous
    lacking in boldness
    careful
    exercising caution or showing care or attention
    cagey, cagy, chary
    characterized by great caution and wariness
    fabian
    using cautious slow strategy to wear down opposition; avoiding direct confrontation
    gingerly
    with extreme care or delicacy
    guarded, restrained
    prudent
    overcautious
    unnecessarily cautious
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  2. adjective
    carelessly failing to exercise proper caution
    “an incautious step sent her headlong down the stairs”
    Synonyms:
    careless
    marked by lack of attention or consideration or forethought or thoroughness; not careful
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