disgraceful; scandalous; ominous; ill-omened
Describes events, incidents, or behavior that bring shame or are seen as a bad omen. Often used in formal or news contexts, especially in the phrase 不祥事 (scandal).
会社で不祥事が発覚した。
A scandal was uncovered at the company.
不祥な出来事が続いた。
A series of disgraceful incidents occurred.
不祥 (as in 不祥事) means 'inauspicious/scandalous' and is a completely different word that just happens to share the same reading as 不詳.
From the kanji 不 (not) and 祥 (good omen, auspicious), literally 'not auspicious'. The meaning extended to 'disgraceful' or 'scandalous' in modern usage.