þróuðu

þróuðu is the third-person plural past tense form of the Icelandic verb þróa, meaning to develop, to grow, or to evolve. It is used when the subject of the sentence is plural and the action took place in the past. For example: Fyrirtækin þróuðu nýjar aðferðir. The corresponding singular past tense is þróaði, as in Hann þróaði nýjar aðferðir.

The form is part of standard Icelandic verb conjugation and appears in written and spoken language. It can occur in historical narratives, academic writing, news reporting, and other contexts describing past development or progression by multiple actors.

Etymology: The verb þróa is of Germanic origin and has cognates in related North Germanic languages. In Icelandic, the past tense plural form þróuðu reflects one of the regular preterite inflections for verbs of this class.

In sentences with a singular subject, use þróaði; with a plural subject, use þróuðu. For a negative or conditional construction, different moods may be used, but the base word remains þróa.