optickému

Optickému is the dative singular form of the Czech adjective optický, meaning optical. It is used before masculine or neuter nouns in the dative case, for example in phrases such as optickému systému (to the optical system) or optickému světlu (to the optical light). The form reflects the standard Czech system of adjective decline, where adjectives agree with the noun in gender, number and case.

In practice, optický has several inflected forms depending on gender and case. The dative singular masculine and neuter form ends in -ému, which is the form seen in optickému. Feminine forms differ; for example, the feminine dative singular is not optickému. The instrumental and locative forms follow their respective adjective endings, such as optickým in instrumental singular and optickém in locative singular.

Usage notes: optický describes things related to vision, optics or the study of light. It appears in scientific, technical and everyday language to qualify nouns like optický systém, optické zařízení, or optické vlákno, depending on the noun’s gender and the intended case.

Etymology: the Czech adjective optický is derived from optika (optics) with the common adjectival suffix -ický. The root opt- traces back to historical terms for sight or vision, with influences from Latin and Greek through the word family for optics.

See also: optika, optický, Czech grammar, adjective declension.