kordumisel
Kordumisel is an Estonian grammatical form used to express “in repetition” or “upon repetition.” It is the adessive form of a nominalized stem related to kordumine, the noun meaning repetition or recurrence. The construction is formed by taking the nominalized stem (kordumine, or a related verb-based source) and adding the adessive suffix -misel, yielding kordumisel. In usage, kordumisel functions to indicate the circumstance, condition, or time frame in which an action occurs, especially in formal, technical, or instructional writing.
In practice, kordumisel appears in sentences to mark that something happens when something is repeated or occurs
Etymology and morphology: the form reflects Estonian patterns for creating adessive nominal clauses from verb-derived stems.