Isikuline

Isikuline is an Estonian adjective meaning relating to a person or to the personal realm; it is used to denote attributes or qualities pertaining to an individual. Its formation comes from isik (person) plus the suffix -uline, a productive affix that yields adjectives meaning “pertaining to” or “characteristic of.” In usage, isikuline appears primarily in formal registers such as linguistics, sociology, privacy law, and discussions of human-centered design. In everyday speech, more common words for personal include isiklik.

In Estonia’s data protection discourse, the standard term for personal data is isikuandmed; isikuline is used when describing properties or aspects that relate to individuals more abstractly. The term thus functions as a descriptive label in contexts that emphasize the human or personal dimension of a subject, rather than as a generic synonym for everyday private or private-life connotations.

Related terms include isik (person), isikukood (personal identification code), and isikuandmed (personal data). The isikuline form is part of the broader Estonian system of noun-based word formation with the -uline suffix, common in academic and administrative language.