1. heedless of danger or the consequences of one's actions; rash or impetuous.
"you mustn't be so reckless"
synonyms: rash, careless, thoughtless, incautious, heedless, unheeding, inattentive, hasty, overhasty, precipitate, precipitous, impetuous, impulsive, daredevil, devil-may-care, hot-headed.
1. done consciously and intentionally.
"a deliberate attempt to provoke conflict"
synonyms: intentional, calculated, conscious, done on purpose, intended, planned, meant, considered, studied, knowing, wilful, wanton, purposeful, purposive, premeditated, pre-planned, thought out in advance, prearranged, preconceived, predetermined.
1. happening by chance, unintentionally, or unexpectedly.
"a verdict of accidental death"
synonyms: fortuitous, chance, occurring by chance/accident, adventitious, fluky, coincidental, casual, serendipitous, random, aleatory; More
unexpected, unforeseen, unanticipated, unlooked-for;
unintentional, unintended, inadvertent, involuntary, unplanned, unpremeditated, unthinking, unmeant;
unwitting, unknowing, unconscious, subconscious;
antonyms: intentional, planned
"the location is accidental and contributes nothing to the poem"
synonyms: incidental, unimportant, by the way, by the by, supplementary, subsidiary, subordinate, secondary, marginal, minor, lesser, accessory, peripheral, tangential, extraneous, extrinsic, parenthetical, irrelevant, immaterial, beside the point, of little account, unnecessary, non-essential, inessential.