If you say that someone is incautious, you are criticizing them because they do or say something without thinking or planning. [formal, disapproval]
In case you think I was incautious, take a look at the map.
Synonyms: careless, rash, reckless, precipitate
incautiously adverb [ADVERB with verb] Incautiously, Crook had asked where she was.
Synonyms: rashly, precipitately, recklessly, impulsively