This is the 5596th most frequent Russian word.
поступка
"Поступка" means "an act" or "a deed" in English.
In this sentence, 'поступка' refers to a singular act or deed performed by someone, emphasizing its effect or characteristic.
Её поступка меня удивила.
Her action surprised me.
Here, 'поступка' represents someone's deeds or actions in a general, plural form, showcasing dimensions of character.
Мы всегда оцениваем людей по их поступкам.
We always judge people by their actions.
In this sentence, 'поступка' is used singularly to depict any individual action or behavior that is noted or remembered.