Loaded with cargo or goods, or figuratively, burdened or filled with something significant.
From 'freight' (to load cargo) + the past participle suffix '-ed.' The word evolved to include metaphorical uses meaning 'heavily laden' or 'burdened.'
The phrase 'freighted with meaning' is a genius metaphor—it borrowed the image of ships weighted down with cargo to describe how heavy or loaded with significance something can be.
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