the word 'spooked' originates from the dutch term 'spook', meaning a ghost or spectre, which itself has germanic roots. it entered american english in the 19th century, initially referring to hauntings or ghostly presences. the semantic shift from a noun for a ghost to a verb meaning 'to frighten' is a classic example of metonymy, where the cause (a ghost) gives its name to the effect (fear). the addition of the common english past participle suffix '-ed' creates an adjective describing the state of having been frightened, as if by a ghost, capturing a sudden, eerie alarm.

Structure: spook (ghost) + ed (past participle/adjective suffix) spook (from dutch 'spook', meaning ghost or spectre); ed (from old english '-ed', '-od', '-ad', past participle and adjective-forming suffix)