The word 'stab' first appeared in Middle English, around the late 14th century, with the meaning 'to thrust with a pointed weapon'. Its ultimate origin is obscure but it is likely related to, or influenced by, Old Norse 'stefna' ('to thrust, strike') or a lost Germanic root. The core concept has always been a sudden, piercing thrust. The addition of the regular '-ed' suffix, descended from the Old English weak verb conjugation '-ode/-ede/-de', marks the word for its standard past tense and past participle forms. Thus, 'stabbed' directly conveys the completed action of having delivered such a piercing blow, a meaning that has remained consistent from its violent physical origins to its modern metaphorical extensions describing emotional pain.

Structure: stab (to pierce) + ed (past tense/participle suffix) - stab: A word of uncertain origin, possibly from a Germanic base. Its functional role is the core verb root meaning to pierce or thrust. - ed: A suffix of Old English origin, used to form the past tense and past participle of regular verbs.