a.
Imprudent, unguarded, unwary, inconsiderate, careless, heedless, thoughtless, headlong, reckless, indiscreet, incautious, giddy, flighty, unsteady, wild, giddy-brained, hare-brained.
UNCIRCUMSPECT
Meaning of UNCIRCUMSPECT in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012