The word 'teaching' originates from the Old English verb 'tǣcan', which meant to show, demonstrate, or instruct. This verb is related to the Old English noun 'tācn', meaning a sign or token, suggesting the core idea of conveying knowledge by giving signs or pointing things out. The addition of the '-ing' suffix, a common Germanic method for forming nouns from verbs, transforms the action into a concept denoting the profession, activity, or body of knowledge itself. Thus, the literal progression from "showing a sign" to the modern abstract concept of systematic instruction captures the evolution of pedagogical practice.

Structure: teach (to instruct) + ing (action or result) 'teach' is from Old English 'tǣcan' (to show, point out, instruct), of Germanic origin. '-ing' is a suffix from Old English '-ung' or '-ing', forming verbal nouns indicating an action or its result.