надковываться v stresses
gen.	lengthen (by forging, hammering); add; join (by forging, hammering)
надковывать v
gen.	lengthen (by forging, hammering); add; join (by forging, hammering)
Gruzovik	lengthen by forging, hammering (impf of надковать); add by forging, hammering (impf of надковать); join by forging, hammering (impf of надковать)