overshadow

v. t. [ imp. & p. p. Overshadowed p. pr. & vb. n. Overshadowing. ] [ Cf. Overshade. ] 1. To throw a shadow, or shade, over; to darken; to obscure. [ 1913 Webster ]

There was a cloud that overshadowed them. Mark ix. 7. [ 1913 Webster ]

2. Fig.: To cover with a superior influence; to be viewed as more important than. Milton. [ 1913 Webster +PJC ]

3. To cause to be sad or disappointing; to cast a sad shadow on; as, an accidental death overshadowed the joy of the festival. [ PJC ]

n. One that throws a shade, or shadow, over anything. Bacon. [ 1913 Webster ]