n. 
道,河道
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extricator,
extrinsic,
extrinsical,
extrolite,
extron,
extrophia,
extrophy,
extrorse,
extrovate,
extroversion,
相似单词
watercolour,
water-column,
water-control,
water-cool,
water-cooled,
watercourse,
watercraft,
watercress,
waterculture,
water-cushion,