Relating to or taking place in open fields or open countryside, especially regarding military operations or pitched battles.
From Latin campalis, derived from campus (field, open ground). The adjective form indicates something that belongs to or happens in fields.
When the Medieval Latin legal phrase 'campal field' described a judicial duel fought in open space, it showed how field-related words became tied to formal combat—your argument got 'settled in the field' through ritualized violence.
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