This is the 15328th most frequent Polish word.
skupiæ
To focus or concentrate.
Here, 'skupiłem się' means 'I focused' and refers to the action of concentrating one's attention on a task.
Skupiłem się na lekcji, aby lepiej zrozumieć temat.
I focused on the lesson to better understand the topic.
In this example, 'skupić' means 'to concentrate' and pertains to allocating efforts intentionally.
Firma planuje skupić swoje wysiłki na rynku międzynarodowym.
The company plans to concentrate its efforts on the international market.
Here, 'skupiliśmy' means 'we bought' or 'collected' and refers to the purchase or gathering of items.