почерням означава в английски

blacken [blackened, blackening, blackens]▼(make black)
verb
[UK: ˈblækən] [US: ˈblækən]

denigrate [denigrated, denigrating, denigrates]▼(blacken)
verb
[UK: ˈde.nɪ.ɡreɪt] [US: ˈde.nɪ.ˌɡret]