To test.  To correct.

This word can be interpreted in other ways, but this is the translation that is consistent with the rest of Scripture.

Strong's definition of  kolasi--keep in mind that lexicons and dictionaries are not the inspired Word of God.

2851 κολασις kolasis kol'-as-is
from 2849; TDNT-3:816,451; n f
AV-punishment 1, torment 1; 2
1) correction, punishment, penalty

Strong's definition of  basanismos--keep in mind that lexicons and dictionaries are not the inspired Word of God.

929 βασανισμος basanismos bas-an-is-mos'
from 928; TDNT-1:561,96; n m
AV-torment 6; 6
1) to torture, a testing by the 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) torment, torture
2a) the act of tormenting
2b) the state or condition of those tormented 

Strong's definition of  basanizo--keep in mind that lexicons and dictionaries are not the inspired Word of God.

928 βασανιζω basanizo bas-an-id'-zo
from 931; TDNT-1:561,96; v
AV-torment 8, pain 1, toss 1, vex 1, toil 1; 12
1) to test (metals) by the 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) to question by applying torture
3) to torture
4) to vex with grievous pains (of body or mind), to torment
5) to be harassed, distressed
5a) of those who at sea are struggling with a head wind