slow-release

The compound adjective "slow-release" is a modern formation from two native English elements. "Slow" originates from the Old English 'slāw', meaning sluggish or not quick, a term with Proto-Germanic roots. "Release" entered English via Old French from the Latin 'relaxare', meaning to loosen or slacken. The logic of the compound is transparently descriptive: it combines the concept of a reduced speed ("slow") with the act of setting something free or making it available ("release"). This literal combination perfectly captures the modern technical meaning of a substance designed to become active or available at a deliberately gradual pace, as opposed to all at once.

Structure: slow (slow) + release (release) - slow: From Old English 'slāw' (inactive, sluggish). Functional role: Modifier describing the manner of the action. - release: From Old French 'relaissier', from Latin 'relaxare' (to loosen). Functional role: Core action being modified.