Past tense of 'sub,' meaning to substitute for someone or to write subtitles for a video or film.
Short for 'substitute,' from Latin 'substituere' (sub- 'under' + statuere 'to set'). Became popular slang in the 20th century for both sports and media contexts.
The word 'sub' got repurposed by different communities—soccer players use it for replacements, anime fans use it for subtitled versions, and it's even a sandwich, all from the same root.
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