Tsirkulaarse
Tsirkulaarse is the genitive singular form of the Estonian adjective tsirkulaarne, meaning circular or relating to a circle. In modern Estonian, tsirkulaarne is used to describe things that are circular in shape or that pertain to circular communications, such as memos or notices. The form tsirkulaarse appears when the adjective modifies a noun in the genitive case, for example in phrases like tsirkulaarse kirja (of the circular letter), tsirkulaarse teate (of the circular notice), or tsirkulaarse dokumendi (of the circular document).
Etymology and usage: tsirkulaarne is a relatively recent loanword in Estonian, formed with the common Estonian
Grammar notes: In Estonian, adjectives agree with the nouns they modify in case and number. The nominative