fat-free

The word is a modern English compound adjective formed by directly combining two native English roots. The first element, 'fat', originates from the Old English concept of being well-fed or oily. The second element, 'free', carries its ancient Germanic sense of being exempt or removed from a condition. When combined, the literal meaning 'exempt from fat' logically evolved into the precise modern commercial and nutritional label denoting a complete absence of fat content. This compounding follows a straightforward and transparent pattern common in English for describing the absence of a substance.

Structure: fat (grease, oil) + free (without) - fat: From Old English fǣtt ('fatted, plump'), related to fǣtan ('to cram, load'). In this compound, it functions as the noun root denoting the substance. - free: From Old English frēo ('exempt, not in bondage'), from Proto-Germanic frijaz. In this compound, it functions as an adjective meaning 'lacking, devoid of'.