The term nupturient refers to a person who is about to enter into a marriage; in Roman law and its descendants (including canonical and some family laws) it denotes a prospective spouse or the party preparing to wed. In modern Polish usage, nupturient is commonly used as a legal term for someone formally declaring the intention to marry at the civil registry office. Contextual notes:

• Latin origin: nupturiens (plural nupturientes) and nupturientis (genitive) form the basis of the term.
• Legal usage: historically used in Roman law and in fields derived from it, such as canon law and certain civil-law contexts to describe the person who intends to marry.
• Contemporary usage: widely recognized in Polish legal and administrative language as the person declaring the intention to marry; the plural nupturienci appears in official contexts, though you’ll also see nupturient as a singular noun for an individual.

If you’d like, I can tailor a short gloss in Polish and English with example sentences or provide references from bilingual legal dictionaries.