aastane

Aastane is an Estonian adjective meaning "annual" or "yearly." It describes something that occurs once per year or spans a one-year period, such as payments, reports, or statistics. The word is used as a modifier before the noun it describes and must agree with that noun in number and case.

Common examples include aastane tasu (annual fee), aastane kasv (annual growth), and aastaaruanne (annual report). Aastaaruanne is a compound noun formed from aasta (year) and aruanne (report), illustrating how aastane functions within typical Estonian word formations.

Grammatically, aastane is an attributive adjective that declines like other Estonian adjectives to match the noun it modifies in number and case. This means its form changes depending on how the noun is used in a sentence, though the basic meaning remains “pertaining to a year.”

Etymology-wise, aastane derives from aasta, the Estonian word for "year," with the common adjectival suffix -ne that turns a noun into an adjective describing a quality or characteristic. The term is widely used in formal and everyday language to distinguish yearly measures, schedules, and financial figures from those that are non-annual.