suppressor

definition: an electrical device for suppressing unwanted currents
example:
speech part: noun
synonyms: suppresser
definition: a gene that suppresses the phenotypic expression of another gene (especially of a mutant gene)
example:
speech part: noun
synonyms: suppresser
definition: someone who suppresses
example: dictators are suppressors of free speech
speech part: noun
synonyms: suppresser

How suppressor is being used?