相关单词同义词unexpected, sudden, subsidiary, surprising, occasional, 近义词 casual, unexpected, unintended反义词deliberate临近词acclaim, accident, accidentally, accidentalist, accidentalism, accidentalness, accidental load, accidental host, accidental fall, accidental slip, accidental cost, accidental data相似词accha, accident, accident and emergency, accident-prone, accidental death, accidentally, accidentally on purpose idiom, accidents will happen idiom, 返回 accidental