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незамедлительно adv. stresses
gen.	with expedition; instantly; quickly; promptly (q3mi4); without further delay (bookworm); without any further delay (bookworm); right away (Juldiz); urgent (this is urgent-существует необходимость действовать незамедлительно Tanya Gesse); rapidly (Min$draV); sharply (olga garkovik); at a moment's notice (They are always asking us to produce reports at a moment's notice. VLZ_58); straight away (Анна Ф); with immediately (Johnny Bravo); pronto (Andrey Truhachev); on sight (AlesyaSparrow)
Игорь Миг	at the earliest; without prevarication; without prevarication or delays; on a fast-track basis; in a fast-track manner
adv.	at short notice
amer.	at once (They must correct the error at once. Val_Ships)
dipl.	without delay
idiom.	off the bat (VLZ_58); in one's tracks (How To Stop A Cold In its Tracks VLZ_58); without more ado (Yeldar Azanbayev); without more further ado (Yeldar Azanbayev)
inf.	pretty damn quick; in a heartbeat (If I had the money, I would go back to college in a heartbeat. Val_Ships)
law	immediately (Alex_Odeychuk)
Makarov.	incontinently
med.	stat (slitely_mad)
obs.	incontinent
slang	INYM (Svetlana D)
незамедлительный adj.
gen.	instant; speedy; sweeping (scherfas); immediate (MichaelBurov); express (Johnny Bravo)
Игорь Миг	priority
inf.	crash (Побеdа)
law	prompt
Makarov.	swift; instantaneous
math.	immediate
offic.	undelayed (igisheva); unretarded (igisheva)
незамедлительно adv.
gen.	in short order; directly (VLZ_58); straight off the ice; without a moment's delay (This draft must be reviewed without a moment's delay. ART Vancouver); at once; in a moment; with great haste (The report also makes mention of a sighting of a massive jellyfish in 1969 off of Bermuda. In this report, divers Richard Winer and Pat Boatwright reported seeing a “giant purplish colored jellyfish with an almost pink outer bell rim pulsating through the water” with the diameter of its bell estimated as being nearly 100 feet across. They vacated the vicinity with great haste. (mysteriousuniverse.org) ART Vancouver)
brit.	sharpish (VLZ_58)
law	forthwith (... failing which this Agreement will automatically terminate and all the rights granted hereunder shall forthwith revert to the Proprietor.)
O&G, sakh.	forthwith (shall idemnify forthwith and without dispute...)

незамедлительно : 106 phrases in 33 subjects

Accounting	1
American usage, not spelling	1
Aviation	3
Business	5
Caspian	1
Diplomacy	2
Economics	1
European Bank for Reconstruction and Development	1
Finances	1
Firefighting and fire-control systems	1
Fish farming pisciculture	1
Formal	3
General	35
Humorous / Jocular	1
Intelligence and security services	1
International law	1
Investment	1
Journalism terminology	1
Laser medicine	1
Law	8
Makarov	14
Maritime law & Law of the Sea	1
Medical	2
Military	4
Notarial practice	1
Oil / petroleum	1
Politics	1
Programming	5
Scientific	1
Security systems	2
Slang	1
Technology	2
Transport	1