oscurecer2

² = obscure, overshadow, dim, darken, night + fall.

Ex. A pseudonym is the name assumed by an author to conceal or obscure his or her identity.

Ex. And when the maintenance of structure is permitted to overshadow the functional performance of the institution, it will move toward extinction.

Ex. At first, analyzing the way he went about his work eroded his confidence, threw him off balance, dimmed some of his energetic spirit.

Ex. Gum arabic containing inks darken more than inks without it.

Ex. Finally, as night fell, we reached our last destination.

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* oscurecerse = turn + dark.