forthwith

Etymology

From Middle English forth-with (“at once, immediately; at the same time, already; straight ahead”) [and other forms], partly from the phrase forth with (something), and partly from forth-with-al, furth-with-al (“at once, immediately; together with”) (whence forthwithal).

adv

1. (chiefly formal, literary) Without delay; immediately.
   And no doubt the dry'd Dirt, and Slime of which we were ſpeaking, would have imbib'd ſome Portion of the Humidity, the Day before the Nile overflow'd, had it not been kept ſo cloſe: but being once releas'd from that Cuſtody, it forthwith ruſhes into the Embraces of the deſir'd Moiſture, following the natural Propenſity of dry Bodies to wet. 1714, T[itus] Lucretius Carus, “Of the Annual Inundation of the River Nile”, in Thomas Creech, transl., Of the Nature of Things. Translated into English Verse[…], volumes II (Containing the Fifth and Sixth Books), London: Printed by John Matthews, for George Sawbridge,[…], →OCLC, page 703
   The Thunder Child fired no gun, but simply drove full speed towards them. It was probably her not firing that enabled her to get so near the enemy as she did. They did not know what to make of her. One shell, and they would have sent her to the bottom forthwith with the Heat-Ray. 1898, H.G. Wells, “The "Thunder Child."”, in The War of the Worlds, Leipzig: Bernhard Tauchnitz, retrieved 2022-11-24, page 175
   The task was the harder in that the restored service had not only to start forthwith but also to last for several months pending modifications to the multiple-unit electric stock, and this called for organisation on a semi-permanent basis. 1961 July, “Glasgow emergency – the restoration of Clydeside steam suburban services”, in Trains Illustrated, page 431
   [Hans] Jonas emphasized years ago that the prospect of genetic control, though cloning and other means, "raises ethical questions of a wholly new kind," for which we are profoundly unprepared. … Is it defensible in any sense, for instance, to set out forthwith to create "grade A individuals", "kids made to order," whether designed as privileged deciders of policy or merely dumb drones for the duller humdrum chores of life? 1998, Richard M. Zaner, “Surprise! You’re Just Like Me!: Reflections on Cloning, Eugenics, and Other Utopias”, in James M. Humber, Robert F. Almeder, editors, Human Cloning (Biomedical Ethics Reviews), New York, N.Y.: Springer Science+Business Media, →DOI, →ISSN, page 114
   [W]hen the Board announced in March 1940, that after a certain date in May no Customs staff aged 23 or over would be allowed to join the Armed Forces it made our minds up for us. We were both 23! We forthwith applied for permission to enlist in the RAF. 2010, Martin W. Bowman, “Dam Buster – Dudley Heal”, in Bombs Away!: Dramatic First-hand Accounts of British and Commonwealth Bomber Aircrew in WWII, Barnsley, South Yorkshire: Pen & Sword Aviation, Pen & Sword Books, page 133