Forthwith

all'improvviso

(without delay — see also immediately, right away)

all'istante

(without delay — see also immediately, right away)

d'improvviso

(without delay — see also immediately, right away)

di colpo

(without delay — see also immediately, right away)

immediatamente

(without delay — see also immediately, right away)

improvvisamente

(without delay — see also immediately, right away)

in tronco

(without delay — see also immediately, right away)

inaspettatamente

(without delay — see also immediately, right away)

lì per lì

(without delay — see also immediately, right away)

su due piedi

(without delay — see also immediately, right away)

subito

(without delay — see also immediately, right away)

tempestivamente

(without delay — see also immediately, right away)

tutto d'un colpo

(without delay — see also immediately, right away)