S: (n) shadow (a premonition of something adverse) "a shadow over his happiness"
S: (n) trace, vestige, tincture, shadow (an indication that something has been present) "there wasn't a trace of evidence for the claim"; "a tincture of condescension"
S: (n) shadow (refuge from danger or observation) "he felt secure in his father's shadow"
S: (n) shadow (a dominating and pervasive presence) "he received little recognition working in the shadow of his father"
S: (n) tail, shadow, shadower (a spy employed to follow someone and report their movements)
S: (n) shadow (an inseparable companion) "the poor child was his mother's shadow"
Verb
S: (v) shadow (follow, usually without the person's knowledge) "The police are shadowing her"