noun which may take the genitive case particle 'no', na-adjective, noun
unspecified; random; indefinite
Used to describe something that is not specifically identified or determined, often in contrast to 特定 (specified). Common in phrases like 不特定多数 (unspecified large number of people).
You need to be careful in places where an unspecified large number of people gather.
This survey targets unspecified respondents.
不特定 means unspecified or not particularized, the direct opposite of 特定, which means specific or clearly identified.
unspecified large number of people; general public
Compound of 不 (negative prefix) and 特定 (specified), literally 'not specified'.