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окостеневать v stresses
gen.	stiffen; co ossify; co-ossify; become stiff; ossify (также перен.); become numb; grow stiff (Andrey Truhachev)
agric.	harden
Gruzovik, med.	become stiff (impf of окостенеть); become numb (impf of окостенеть)
Makarov.	to co-ossify
med.	ossify