• (RP) IPA: /fɔːθˈwɪð/, /-ˈwɪθ/
• (GA) IPA: /fɔɹθˈwɪθ/, /ˈfɔɹθˌwɪθ/

forthwith (not comparable)

1. (chiefly, formal, literary) Without delay#Noun|delay; immediately. [from early 14th c.]

   Synonyms: forthwithal, Thesaurus:immediately

   • 1533, Erasmus of Roterdame, “The Thyrde Instruction”, in [anonymous], transl., A Playne and Godly Exposytion or Declaration of the Commune Crede (which in the Latin Tonge is Called Symbolum Apostolorum): And of the .x. Commaundementes of Goddes Law. […], imprinted at London […]: By me Robert Redman, […] [for William Marshall], OCLC 1114134812 ↗, folio 66, verso ↗:

     Neyther euery thynge, whiche ony maner way is bredde or gendred of man: is forthwith a man (for els lice#English|lyſe ſholde be called men) But that thynge, whiche is conceyued in the matrice or wombe of a woman, of the very ſubſtaunce of man: [...]

   • 1667, John Milton, “Book VII ↗”, in Paradise Lost. A Poem Written in Ten Books, London: Printed [by Samuel Simmons], and are to be sold by Peter Parker […] [a]nd by Robert Boulter […] [a]nd Matthias Walker, […], OCLC 228722708 ↗; republished as Paradise Lost in Ten Books: The Text Exactly Reproduced from the First Edition of 1667: […], London: Basil Montagu Pickering […], 1873, OCLC 230729554 ↗, lines 243–245:

     Let ther be Light, ſaid God, and forthwith Light, / Ethereal, firſt of things, quinteſſence pure, / Sprung from the Deep, [...]

   • 1678, John Bunyan, The Pilgrim’s Progress from This World, to That which is to Come: […], London: Printed for Nath[aniel] Ponder […], OCLC 228725984 ↗; reprinted in The Pilgrim’s Progress (The Noel Douglas Replicas), London: Noel Douglas, […], 1928, OCLC 5190338 ↗, page 129 ↗:

     Then Proclamation was made, that they that had aught#English|ought to ſay for their Lord the King againſt the Priſoner at the Bar, ſhould forthwith appear and give in their evidence.

   • 1885, W[illiam] S[chwenck] Gilbert; Arthur Sullivan, composer, “Our Great Mikado, Virtuous Man”, in […] The Mikado; or, The Town of Titipu, London: Chappel & Co., […], OCLC 25083293 ↗, Act I, page 5 ↗:

     So he decreed, in words succinct, / That all who flirted, leered or winked, / (Unless connubially linked), / Should forthwith be beheaded.

• French: aussitôt, séance tenante
• German: sofort, unverzüglich
• Italian: all'istante, immediatamente, su due piedi, tempestivamente
• Portuguese: imediatamente
• Russian: неме́дленно
• Spanish: inmediatamente