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понимающий с полуслова stresses
inf.	quick on the uptake (Interex)
понимать с полуслова
gen.	take a hint (Anglophile); seize someone's meaning at once (Anglophile); be quick to understand (someone Anglophile)
idiom.	finish each other's sentences (VLZ_58)

понимающий с полуслова: 14 phrases in 7 subjects

Finances	1
General	5
Idiomatic	2
Informal	1
Latin	1
Proverb	3
Religion	1