This is the 882nd most frequent German word.
max
In German, "max" is not a standard word but could be an abbreviation or a name (e.g., short for "Maximilian").
The sentence employs 'Max' as a proper noun, serving as a person's name.
Max ist ein sehr freundlicher Mensch.
Max is a very friendly person.
Here, the phrase 'sein Maximum' utilizes the root 'Max' as part of the word 'Maximum,' referring to the maximum level something can achieve.
Der Preis hat sein Maximum erreicht.
The price has reached its maximum.
In this case, the word 'Maxtempo' combines 'Max' to form a compound noun, meaning the maximum speed at which tasks are completed.