offsides

Words with a similar base: offsides

'offsides'

[offside.n.01] as in: (sport) the mistake of occupying an illegal position on the playing field (in football, soccer, ice hockey, field hockey, etc.)

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'offsides'

[offside.a.01] as in: illegally beyond a prescribed line or area or ahead of the ball or puck

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Examples:
the touchdown was nullified because the left tackle was offside