arendasid

Arendasid is an Estonian verb form that functions as the past tense for the third person plural of the verb arendama (or arendada), meaning to develop, cultivate, or advance. In English it is commonly rendered as “they developed” or “they were developing,” depending on the context. The form appears when the subject performing the action is plural and the action occurred in the past.

Etymology and form: The verb arendada is built on the root arend-, which is related to the abstract noun arendus, meaning development. The infinitive arendada provides the basis for various tense forms, including arendasid for past tense with a plural subject. The past tense plural suffix -sid marks the third-person plural in this verbal system.

Grammar and usage: Arendasid is used in narrative and descriptive contexts to indicate that a group of actors completed or were engaged in developing something in the past. It is common in news reports, historical summaries, project descriptions, and academic writing when referring to actions carried out by multiple agents. The corresponding present tense plural form is arendavad, and the past tense singular form is arendas.

Examples: Nad arendasid uut tehnoloogilist lahendust. They developed a new technological solution. Nad arendasid linna infrastruktuuri. They developed the city’s infrastructure.

Relation to related terms: The noun arendus denotes development, while arendada (or arendama) is the verb meaning to develop. Other tense and mood forms exist for different subject persons and aspects (for example, arendab as present singular, arendavad as present plural, arendas as past singular).

See also: arendus, arendada, arendama.