What is the meaning of Nisi?

decree nisi

island

islander

if not, unless, except

inflection of nīsus:

1. masculine/neuter genitive singular
2. masculine nominative/vocative plural

masculine/neuter genitive singular

masculine nominative/vocative plural

verbal noun of nesa: forgetting

negative second-person singular present of bíti

egg

Source: wiktionary.org