Learn how to say Mutator correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mutate:
change in form or nature:
rhythm and blues mutated into rock and roll
Biology (with reference to a cell, DNA molecule, etc.) undergo or cause to undergo change in a gene or genes:
the virus is able to mutate into new forms that are immune to the vaccine
certain nucleotides were mutated
early 19th century: back-formation from mutation