Straightaway
WordNet
adjective
(1) Performed with little or no delay
"An immediate reply to my letter"
"Prompt obedience"
"Was quick to respond"
"A straightaway denial"
adverb
(2) Without delay or hesitation; with no time intervening
"He answered immediately"
"Found an answer straightaway"
"An official accused of dishonesty should be suspended forthwith"
"Come here now!"
noun
(3) A straight segment of a roadway or racecourse