oscurecer[Espagnol]

verbe
1 : become dark or darker
2 : treat skins and hides with tannic acid so as to convert them into leather
3 : become dim or lusterless
4 : make dim or lusterless
5 : make a smudge on; soil by smudging
6 : make undecipherable or imperceptible by obscuring or concealing
Definitions