Contaminate (5)
'contaminate' is the definition.
(tainting is a kind of contaminating)
This is all the clue.
(Other definitions for taint that I've seen before include "Stigmatise" , "soil" , "Source of infection" , "Flaw in Titan" , "Evidence of pollution" .)
'contaminate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for sully that I've seen before include "Soil or tarnish" , "Taint" , "Besmirch" , "Make dirty" , "Stain or tarnish" .)
'contaminate' is the definition.
(synonyms)
This is all the clue.
(Other definitions for pollute that I've seen before include "Add impurities" , "Adulterate, contaminate" , "Make dirty or impure" , "Taint, foul" , "inhibit plant life?" .)
'contaminate' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for poison that I've seen before include "Eg, strychnine" , "Dangerous substance" , "Eg, toxin" , "Substance that damages tissues or causes death" , "If taken, it can harm or kill" .)
'contaminate' is the definition.
(infecting is a kind of contaminating)
This is all the clue.
(Other definitions for infect that I've seen before include "Transmit disease to another" , "Contaminate with disease" , "Impart a disease" , "Cause sickness (with a virus)" , "Taint with disease" .)