The compound 'stop-smoking' is a modern English formation, transparently combining two established words to create a specific modifier. 'Stop' originates from an Old English verb meaning to block or plug an opening, a sense which broadened to mean causing any activity to cease. 'Smoking' derives from the Old English noun for visible vapor, which by the 16th century was applied to the act of inhaling tobacco smoke. The compound logically follows the pattern of verb+object (stop [the activity of] smoking), directly describing the purpose of an aid, campaign, or effort. Its formation reflects a pragmatic, descriptive approach to vocabulary creation in contemporary health and wellness contexts.

Structure: stop (to cease) + smoking (the act of inhaling smoke) - stop: From Old English stoppian (to block up, close), of West Germanic origin. Functions as a verb root meaning to cease or halt an action. - smoking: From the verb smoke, of Old English smoca (smoke, fume) origin, plus the suffix -ing which forms a gerund (verbal noun). In this compound, it functions as the object of the action 'to stop'.