The word 'strung' is the inflected form of the verb 'string', which traces its lineage to the Old English noun 'streng', meaning a cord or line. This, in turn, derives from the Proto-Germanic 'strangiz', related to the concept of something tight or rigid, a notion also found in its distant Proto-Indo-European ancestor 'strenk-', meaning tight or narrow. The evolution from a noun for a physical cord to a verb meaning to fit or furnish with a string (e.g., a bow or beads) is straightforward, with 'strung' simply marking the completed past action of that process. Its modern abstract uses, such as feeling 'strung out' (tense or exhausted), metaphorically extend from the idea of being stretched tight like a string.

This is a simplex word. It is the past tense and past participle form of the verb 'string', which originates from Old English 'streng' (line, cord, series), from Proto-Germanic 'strangiz'. The '-ung' ending is a modern English inflectional suffix indicating past tense/participle, not a separable morpheme in this form.