at one stroke

Prepositional phrase

1. (literal) With a single blow, effort, or act.
   • I made up my mind that a man confined to his room by inflammation of the lungs, a fellow who had only two wishes left in the world, to see a particular woman, and then to die, could neatly accomplish those two wishes at one stroke by taking this journey in the rain.1895, Thomas Hardy, chapter 9, in Jude the Obscure
   • I should be ready to do the job without being paid for it, though I don't say it is not sweeter to get both gold and revenge at one stroke.1898, G. A. Henty, “On A Mexican Ranche”, in Yule Logs: Longmans' Christmas Annual

   Synonyms:

   in one fell swoop

2. (broadly, figuratively) At once, immediately; in an instant.
   • [T]he whole object of the poem is to show what infinities of spiritual good and evil a current and sordid story may contain. When once this is realised, it explains at one stroke the innumerable facts about the work.1903, Gilbert Keith Chesterton, chapter 7, in Robert Browning
   • . . . with the wind of ruin in his hair,
     Soul sprang full-statured from the broken flesh,
     And at one stroke he lived the whole of life.1909, Edith Wharton, “A Torchbearer”, in Artemis to Actaeon and Other Verses

   Synonyms:

   all of a sudden, in one fell swoop, suddenly