terästäminen

Noun

 * 1) steeling, adding steel into
 * 2)  fortifying, strengthening
 * 3) spiking coverly putting alcohol or another intoxicating substance into a drink, or generally adding a small amount of one substance to another
 * 1) spiking coverly putting alcohol or another intoxicating substance into a drink, or generally adding a small amount of one substance to another