þekktuð

þekktuð is a finite verb form in Icelandic. It represents the second-person plural past tense of the verb þekkja, meaning "to know" or "to be familiar with." The form is used when addressing multiple people and indicating that they knew something in the past.

In usage, þekktuð appears in past-tense statements addressed to more than one person. An example is: Þið þekktuð mig í gær. This translates to "You (plural) knew me yesterday." The form is a standard part of Icelandic conjugation and is written with the letters þ and ð, characteristic of Icelandic orthography.

Morphology and related forms: The verb þekkja originates in Old Norse and has cognates in other North Germanic languages. In Icelandic, other persons and numbers use different endings, such as ég þekkti for the first-person singular past tense. The form þekktuð specifically marks second-person plural in the past indicative.

Notes on meaning: þekktuð is strictly a finite verb form, not a participle. It should not be confused with the past participle adjective þekktur, which means "well-known" or "recognized" when used attributively, as in þekktur maður (a well-known man).

Summary: þekktuð is the plural you form in the past tense of “to know,” used in everyday and written Icelandic to indicate that multiple subjects knew something in the past.