This is the 4035th most frequent Russian word.
максимальная
Maximum.
Here, 'максимальная' is used to describe the utmost limit or highest allowable measure of speed on a roadway.
Максимальная скорость на этой трассе составляет 120 километров в час.
The maximum speed on this track is 120 kilometers per hour.
In this sentence, 'максимальная' refers to the highest level of productivity achieved by someone.
Её максимальная производительность впечатлила всех.
Her maximum productivity impressed everyone.
Here, 'максимальная' is part of an expression meaning exerting the greatest possible effort.