maximum
max-i-mum
noun
The greatest possible amount, level, or degree of something achievable.
"The maximum for this loan is £5000."
adjective
Being the greatest or highest possible in amount, degree, or extent.
"We need to make maximum use of resources."
Thesaurus
Synonyms: upper limit, supreme, sublime, maximal, level best, uttermost, utmost
Antonyms: lower limit, minimal, minimum