utmost
https://gyazo.com/34c2648bfa0153a913f0a40071961a63
adjective attributive
(程度･数量などの点で)最大限の, 最高の, 極度の
e.g. a matter of the utmost importance.
｟かたく｠ ; 〖通例the/one's ～〗 (程度･量･範囲などの)最大限, 極限.
e.g. a plot that stretches credulity to the utmost.
PHRASES
do the most that one is able:
e.g. Dan was doing his utmost to be helpful.
ORIGIN