English
endarken
From en- + darken (see en- (“intensifying prefix”)), modelled on enlighten.
Proto-West Germanic *derk ‘dark’
Proto-West Germanic *dirkinōn ‘to darken’
Old English *deorcnian
Middle English derkenen
English darken
Today it means
verb To render dark or darker.
Language periods are conventional ranges, not dates for this word.
Etymograph / endarken