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обострить отношения stresses
gen.	put the screws on; fuel tension (between bookworm); exacerbate tensions (Bullfinch)
Makarov.	strain relations
math.	make strained relations more acute
обострённые отношения
Gruzovik	tense relations
media.	prickly relations (bigmaxus); strained relations (bigmaxus); tension-rich relations (bigmaxus)

обострённые отношения: 2 phrases in 1 subject

Makarov

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