This is the 499th most frequent Ukrainian word.
восени
"In autumn" or "in the fall."
The word 'восени' is used as an adverb to indicate the season during which a specific condition or action occurs, here describing 'autumn'.
Влітку тепло, а восени прохолодно.
In summer it is warm, and in autumn it is cool.
Here, 'восени' serves as a temporal adverb indicating the time frame when the action happens, specifying 'in autumn'.
Восени листя на деревах стає жовтим.
In autumn, the leaves on the trees turn yellow.
This sentence employs 'восени' to specify the traditional time when the action of traveling is carried out, indicating 'during autumn'.