shadow
UK[ˈʃædəʊ]US[ˈʃædoʊ]
n
A dark shape that appears on a surface when someone or something blocks light.
n
An area of darkness where light from a source is blocked.
n
A very small amount; a trace.
v
To follow and watch someone closely and secretly.
Etymology
The word 'shadow' originates from the Old English noun 'scead(u)we', which itself evolved from the earlier Proto-Germanic 'skadwaz'. This Germanic root is connected to the idea of shade or darkness. The core concept can be traced further back to the Proto-Indo-European root 'skot-', meaning 'darkness' or 'shade', which also gave rise to related words like 'shade' and the Greek 'skotos' (darkness). The logical journey is from the ancient, abstract concept of 'darkness' to the more specific, visually defined 'dark shape' cast by an obstructing object, and finally to its modern metaphorical extensions, such as a 'trace' or the act of close surveillance.
Analysis
The modern English word 'shadow' is a simplex word derived from a single, tightly fused Old English root. It is not productively segmentable into distinct, meaningful morphemes in contemporary English.
Examples
The tree cast a long shadow across the lawn in the late afternoon.
She felt a shadow of doubt after hearing the conflicting reports.
The detective was assigned to shadow the suspect for the next 48 hours.