How do i replace a word using dot to match any character in sed?

[maltiger]

Man page for sed: https://www.lightnetics.com/post/3334

Using the sample file:

$ cat linefile 
This is line one

This is line two

This is line three

We want to replace the word two with 2, use this, match any character before letters wo and replace with 2. Be careful as any word ending in wo would be replaced, this is just a demo of the dot usage.

$ sed 's/.wo/2/g' linefile

Result:
This is line one

This is line 2

This is line three