"he tried his utmost"

同义词： uttermost maximum level best

• of the greatest possible degree or extent or intensity

  "utmost contempt"; " to the utmost degree"

  同义词： extreme uttermost(a)

• highest in extent or degree

  同义词： last

• (comparatives of `far') most remote in space or time or order

  "the utmost tip of the peninsula"

  同义词： farthermost farthest furthermost furthest uttermost