endurtekinnar

I’m not finding a widely recognized definition for “endurtekinnar” in Icelandic or other sources. It appears to be Icelandic and may derive from “endurtekinn/endurtekningar,” meaning “repeated” or “repetitions,” but I want to be sure of the intended meaning and domain.

Could you clarify:

- The field or context (linguistics, culture, sports, technology, biology, etc.)?

- Whether this is a real term or a fictional/constructed concept?

- The exact intended meaning or usage (e.g., “repeated events,” “repetition technique,” “recurrent phenomena,” etc.)?

With that context, I can draft a concise, neutral wiki-style article under 300 words.