This is the 5972nd most frequent Polish word.
ćwiczeniach
"Ćwiczeniach" means "exercises" (in the locative plural form).
In this sentence, 'ćwiczeniach' is used in the locative case to indicate an activity related to physical exercises.
Uczestniczę w ćwiczeniach fizycznych każdego ranka.
I participate in physical exercises every morning.
Here, 'ćwiczeniach' is used in the locative case to refer to exercises connected to language learning.
W ćwiczeniach językowych poprawiłem swoje umiejętności komunikacyjne.
In language exercises, I improved my communication skills.
In this instance, 'ćwiczeniach' represents exercises related to mathematics, again showcasing the locative case.