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смекалка n stresses
gen.	headpiece; sconce; mother wit; gumption; sagacity; astuteness (Anglophile); resourcefulness (Баян); ingenuity (VLZ_58); street smarts (VLZ_58); prowess (VLZ_58); acumen (VLZ_58); head-piece; wits (sever_korrespondent); savviness (YOZ); wisdom (A.Rezvov); nous (george serebryakov); wit (plushkina); mental agility (Ася Кудрявцева); practical intelligence (Logofreak)
Gruzovik	common sense
Игорь Миг	fleet-footedness
amer.	smarts (Val_Ships)
cliche.	quick thinking (ART Vancouver)
fig.	understanding (Andrey Truhachev)
Gruzovik, inf.	sharpness; keenness of wit
idiom.	fancy footwork (Interex)
inf.	shrewdness; native intelligence
product.	smart performance (Yeldar Azanbayev)
slang	savvy; fast footwork (Interex)

смекалка: 24 phrases in 6 subjects

American usage, not spelling	2
General	15
Idiomatic	1
Informal	1
Makarov	4
Slang	1