Словарь синонимов английского языка - promptly

(adv) quickly, at once, straightaway or straight away, directly, right away, immediately, without delay or hesitation, unhesitatingly, swiftly, cpeedily, readily, instantly, instantaneously, punctually, expeditiously, with celerity, with alacrity, Colloq US and Canadian momentarily: If this bill is not paid promptly, we shall have to discontinue your credit arrangements.