This is the 8951st most frequent Russian word.
рабочая
"Рабочая" means "working" or "worker" (feminine form).
Here 'рабочая' is a noun that refers to a female worker or laborer.
Рабочая завершила свой труд, и фабрика прекратила работу на вечер.
The worker finished her tasks, and the factory ended operations for the evening.
Here 'рабочая' is used as an adjective meaning 'productive' or 'work-related' to describe the environment.
У меня сегодня очень рабочая обстановка, так что я могу много сделать.
Today I have a very productive environment, so I can accomplish a lot.
Here 'рабочая' is part of the phrase 'рабочая неделя,' meaning 'workweek,' modifying 'неделя' to relate to the concept of the work or job week.