This is the 12814th most frequent Polish word.
nogą
"Nogą" means "with a leg" or "by the leg" in English.
In this sentence, 'nogą' is in the instrumental case, indicating the means by which an action is performed, specifically using her leg to kick the ball.
Kopnęła piłkę nogą, aby ją przenieść na drugą stronę.
She kicked the ball with her leg to move it to the other side.
Here, 'nogą' again appears in the instrumental case, used to describe the relationship between the subject (the person) and the object affected (the stone).
W czasie wędrówki uderzył się nogą o kamień i musiał przystanąć.
While hiking, he hit his leg on a stone and had to stop.
In this context, 'nogą' is used to specify which part of the body is in contact with the table, showcasing its instrumental function to denote physical interaction.