What Is the Difference between "curb" and "kerb"?

The Quick Answer
When the word curb/kerb means the edging of a pavement (or a sidewalk), it is spelt curb in the US and Canada, but kerb outside North America.
Curb
The verb to curb means to control or to limit.For example:
- We must curb our spending next month.

- The US will curb its influence over the next decade.

For example:
- It will be a curb on spending.

Kerb
Americans don't need to worry about the word kerb. It doesn't exist in American English. However, for Brits, kerb is the stone edging of a pavement. For example:- She tripped over the curb.
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