Finally, some Janus words come about through simple confusion.

最后一点，有些双面词是通过简单的混淆而产生的。

The Janus words arise when a new meaning branches off, while the old one survives.

当一个新的含义出现，而旧的含义也得以保留时，双面词就出现了。

One class of Janus words is particularly troublesome: those that mean different things on opposite sides of the Atlantic.

大西洋两岸意思不同的单词。