biologisiksi

Biologisiksi is the translative form of the Finnish adjective biologinen, meaning biological. In Finnish grammar, the translative case, marked by the suffix -ksi (plural -iksi), expresses a change of state or designation into a category. Therefore biologiseksi is the singular form, and biologisiksi is the plural form used when the predicate refers to multiple items or subjects becoming or being designated as biological.

Usage of biologisiksi occurs most often in predicates expressing transformation or classification. It appears with verbs such as muuttua (to become) and tulla (to come to be), or in passive-like constructions. Examples include: Näytteet muuttuvat biologisiksi (The samples become biological) and Tutkijat ovat muuttuneet biologisiksi (The researchers have become biological). A related use is luokitella tai luokiteltu + biologisiksi, for example Lajit on luokiteltu biologisiksi (The species have been classified as biological). While biologinen describes a static quality, biologisiksi emphasizes a shift or designation into the biological category.

Etymology and related forms: biologisiksi is derived from biologinen, which in turn comes from biology (bio- + -logi- + -inen). The suffix -ksi/-iksi marks the translative case in Finnish, a feature used to express becoming or designation. Related terms include biologinen (singular, base adjective) and biologia (the discipline of biology). See also Finnish translative case and Finnish adjective inflection.