Learn Finnish: Sodanjälkeinen aikakausi oli ajanjakso, jona maa muuttui nopeasti. - The post-war era was a period during which the country changed rapidly.

Sodanjälkeinen aikakausi oli ajanjakso, jona maa muuttui nopeasti.

The post-war era was a period during which the country changed rapidly.

Breakdown of Sodanjälkeinen aikakausi oli ajanjakso, jona maa muuttui nopeasti.

Questions & Answers about Sodanjälkeinen aikakausi oli ajanjakso, jona maa muuttui nopeasti.

Why is the relative pronoun jona in the essive case here, and how does it mean "during which"?

Jona is the essive form of joka. In Finnish, the essive case (ending in -na or -nä) is often used to express a point in time or a time period (like in tänä vuonna, "this year"). When it refers back to ajanjakso (period), using the essive turns it into "at which time" or "during which".

How is the adjective sodanjälkeinen (post-war) formed?

It is a compound word made from sodan (the genitive form of sota, meaning "war's") and jälkeinen (an adjective meaning "after" or "subsequent"). Finnish often builds these adjective structures by combining a genitive noun with a position-based adjective.

Why is the verb muuttui used instead of muutti for "changed"?

Muuttua (past tense muuttui) is an intransitive verb, meaning something changes itself (here, the country changed). If you used muuttaa (past tense muutti), it would be transitive, meaning the country changed something else, or it would mean that the country relocated (moved house).

Aikakausi and ajanjakso both relate to time. What is the difference between them?