tühistanud

Tähistanud is the past active participle of the Estonian verb tähistama, meaning to celebrate, mark, or commemorate. It literally denotes having completed the act of marking or commemorating something. In usage, tähistanud can describe a person, organization, event, or action that has performed or completed the act of celebrating or marking.

In grammar, tähistanud forms part of compound tenses and can function as an attributive modifier in noun phrases. For example, in a sentence like "Ta on tähistanud mitmeid tähtpäevi" the phrase indicates that the person has celebrated several anniversaries. The participle can be used in formal or written Estonian to convey that a celebration or marking has taken place, often in connection with events, anniversaries, or memorials. It may appear in headlines or summaries to pack information succinctly about past celebratory actions.

Etymologically, the word is derived from the verb tähistama with the past active participle suffix, forming tähistanud to express “having celebrated/marked.” Related forms include the infinitive tähistama and other participles that describe timing or completion of marking acts.

Usage considerations include choosing tähistanud to emphasize completion of a celebration or marking, as opposed to mere occurrence of an event. It is commonly found in news reporting, historical writing, and formal narration when summarizing what has been celebrated or commemorated.

See also: tähistama, tähistamine, tähistus.