the best in …; the most in …

one, 1 / first, foremost / group / entirely, wholly / other / merely, only

a hand / a handle, grip / a paw, foreleg / a way of acting, means / (board games) a move, play

投手: (baseball) pitcher / 党首: (politics) party leader / 当主: a head of family / 頭首: a head of group

having one's hands full

to beat, to strike

the fullest extent; the limit (of one's power, etc.)

With all one's might; to the fullest; as much as possible.

maximal, possessing all one's might

seriously fast speed