shadow
//ˈʃædoʊ//
Noun
A dark area or shape produced by a body coming between rays of light and a surface
The tree cast a long shadow on the ground.
Partial or complete darkness, especially as produced by a body intercepting light
The valley was in shadow for most of the day.
A person or thing that follows or accompanies another constantly
The dog became his constant shadow, following him everywhere.
A slight trace or vestige of something
There was not a shadow of doubt in her mind.
Synonym
Antonym
Verb
To follow and observe someone closely and secretly, especially for surveillance
The detective shadowed the suspect for three days.
To cast a shadow over; to shade or darken
The tall building shadowed the street below.
To accompany someone in their daily activities to gain experience or learn about their work
She shadowed a doctor for a week to learn about the medical profession.