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
Part of Speech: noun masculine
Citing in TDNT: 1:561, 96
From G928; torture: - torment.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root βασανισμός; click on the second column to search for that grammatical form of the root βασανισμός; click on the third column to search for that word and grammatical form; click on the total to search for the root βασανισμός.