extra- ekstrə- ˈɛkstrə
PREFIX （用于构成形容词）表示“在…之外”，“超出” extra- is used to form adjectives indicating that something is outside something or is not part of it. （用于构成形容词）表示“在…之外”，“超出” [formal]
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The move was extra-constitutional.
此举超出了宪法的规定范围。
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They competed for power through a combination of parliamentary and extra-parliamentary methods.
他们在议会内外同时下手争夺权力。
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The report says torture was widespread, as were extra-judicial executions by government troops.
报告说酷刑普遍存在，政府军法外行刑也屡见不鲜。