lisandumine

Lisandumine is an Estonian noun meaning the act or process of adding. In English, it is commonly translated as addition or addendum, depending on context. The term derives from the verb lisama (to add) and the noun-forming suffix -mine; related forms include lisand, meaning an additive, and lisandum, the element that is added.

In mathematics and arithmetic, lisandumine denotes the operation of addition—combining two numbers to obtain their sum. The concept is foundational to arithmetic, with standard properties such as commutativity and associativity applying to addition.

In publishing, law, and formal documentation, lisandumine refers to an addendum or appendix appended to a document, providing supplementary information, corrections, or clarifications. It can also describe an inserted clause or statement within a text, used to expand or refine the original content without altering its main body.

In a broader linguistic or rhetorical context, lisandumine may denote supplementary information added to discourse, such as an adjunct phrase or a postposed modifier that adds detail or qualification.

See also: Estonian language, addition, addendum, lisand, lisama.