perhaps remotely from the same as 939 (through the notion of going to the bottom); TDNT - 1:561,96
AV - torment 3; 3
1) a touchstone, which is a black siliceous stone used to test the purity of gold or silver by the colour of the streak produced on it by rubbing it with either metal
2) the rack or instrument of torture by which one is forced to divulge the truth
3) torture, torment, acute pains
3a) of the pains of a disease
3b) of those in hell after death