I just looked it up, and apparently “impregnate” isn’t in the list either. Yes, the word isn’t offensive by itself, but I think they remove quite a lot of words that might cause problems in the what3words address. There is way more than enough words anyway.

This is from their FAQ:

How do you handle offensive words?

A what3words address is made up of 3 random words, and they are not intended to convey any meaning to a location. However, we know that the nature of using words means that unexpected interpretations can crop up.

For each new what3words language, our team consults a broad range of native speakers. We then work together to remove rude and offensive words from our word lists, navigating cultural sensitivities wherever we can.

Some users feel that certain words in our lists are unsuitable or inappropriate, so we always take feedback onboard. However, one of our key features – that our addresses are permanently fixed – means that it is not possible to update the word list. Instead, we can look for opportunities to adapt our approach when developing future languages.

Tip: if you’d rather avoid a certain what3words address because of a particular word or combination of words, we’d suggest you use the next square along.