A synonym for "fragilizador" is "friabilizador" in Spanish, which translates as "friability tester" in English. Here is a definition of "friability testing" from Wikipedia: Friability testing is a laboratory technique used by the pharmaceutical industry to test the likelihood of a tablet breaking into smaller pieces during transit. It involves repeatedly dropping a sample of tablets over a fixed time, using a rotating wheel with a baffle, and afterwards checking whether any tablets are broken, and what percentage of the initial mass of the tablets has been chipped off. A typical specification will allow a certain percentage to be lost by chipping, and will not allow any broken tablets.