injure one's reputation (verb) cast aspersions: make disparaging charges against someone
Sinonime: accidental, adventitious, by chance,
contingent,
erratic,
extemporaneous, extempore, fluky,
fortuitous,
impromptu, improvised,
impulsive,
incidental, infrequent,
irregular, occasional, odd, offhand, serendipitous,
spontaneous,
uncertain,
unexpected,
unforeseen,
unintentional,
unplanned, unpremeditated
Antonime: deliberate,
painstaking,
planned, premeditated