vacuum-packed
Meaning
(of food or another product) sealed in a package from which most of the air has been removed, in order to preserve the contents.
Structure
Usage
The coffee is vacuum-packed to ensure maximum freshness.
I bought some vacuum-packed smoked salmon for the picnic.
These vacuum-packed herbs have a much longer shelf life than fresh ones.
Etymology
The term is a modern compound adjective formed from the noun 'vacuum', derived from the Latin neuter of vacuus ('empty'), and the verb 'pack', of Germanic origin. The concept literally describes the process of 'packing in an empty space', specifically a space devoid of air. This method of preservation leverages the absence of oxygen to significantly slow down the decay and spoilage caused by aerobic bacteria and oxidation. Thus, the word's formation directly and logically reflects the core technological principle behind the packaging technique.
Analysis
- vacuum: From Latin vacuum, meaning 'an empty space, void'. In this compound, it functions as a noun modifier describing the method. - pack: From Middle Dutch/Middle Low German pak, meaning 'bundle, pack'. In this compound, it functions as a verb root meaning 'to put into a container'. - ed: A native English suffix forming past participles, which are commonly used as adjectives.