ajaperioodideks

Ajaperioodideks is the translative plural form of the Estonian noun ajaperiood, meaning “time period.” In Estonian grammar, the translative case expresses a change of state, role, or function and answers questions such as “milleks?” (for what/into what). Ajaperioodideks specifically means “as time periods” or “for time periods” and is used when something is described as divided into, or used as, time periods.

Usage examples are common in historical, scientific, and documentary contexts. For instance, a report might state that data have been esitatud ajaperioodideks jaotatuna, meaning the data are presented divided into time periods. Another example is a chronology that analyzes events ajaperioodideks, i.e., by time periods. The form is typically employed with verbs of division, categorization, or role assignment.

Morphologically, ajaperioodideks is built from ajaperiood in its genitive plural ajaperioodide and takes the translative suffix -ks to indicate a role or state (“as time periods”). The corresponding singular form is ajaperioodiks, used for a single time period.

Related forms include ajaperiood (time period), ajaperioodid (nominative plural), and ajaperioodide (genitive plural). The translative case is one of several Estonian cases used to express function, comparison, or transformation, and ajaperioodideks is the standard form when referring to multiple time periods in this sense.

See also: Estonian grammar, translatiiv (translative case), ajaperiood.