extra

名词复数：extras

词形变化：

形容词: extortive | 名词: extorter | 动词过去式: extorted | 动词过去分词: extorted | 动词现在分词: extorting | 动词第三人称单数: extorts |

词义辨析：

同义:

a.额外的; 补充的

additional

surplus

supplementary

more

spare

同义参见:

secondary

extraneous

plus

excess

over

other

odd

accompanying

occasional

dividend

accessory

bonus