drilled

The word 'drilled' is the inflected past form of the verb 'drill'. The core verb 'drill' has a dual modern meaning stemming from two distinct historical sources that converged in form. Its primary sense, "to bore a hole," likely entered English in the 17th century from Dutch drillen, meaning "to bore, turn in a circle," which is imitative of the action. The secondary sense, "to train rigorously through repetition," emerged in the early 17th century, influenced by the repetitive, mechanical motion of drilling a hole, metaphorically extended to military and educational training. The suffix '-ed' is the standard Germanic past tense marker, inherited from Old English, which attaches to the base verb to indicate completed action, resulting in the unified modern form 'drilled' for both meanings.

Structure: drill + ed - drill: Origin uncertain, possibly from Dutch drillen (to bore, turn in a circle). Functional role: Lexical root/verb meaning to bore or train. - ed: From Old English -ede, -ode, -adon (past tense and past participle suffixes). Functional role: Inflectional suffix marking past tense or past participle.