Abdussamad, thank you very much. Your solution is exactly what I've been looking for.

Hello. I understand how a deterministic wallet works but I've got quite a similar question.
Here's my situation:
I need some dedicated receiving addresses that will be given to different persons. I expect funds to be received to these addresses not immediately but after a while. So I need to be sure not to use this addresses by accident again. I know that Electrum generates a new address every time the old address is used but as I mentioned above funds will be received to these addresses later, so they won't be considered as "used" until it happens. In this case I need either to remove (somehow) these addresses from address list in Electrum or mark them as "used" or have an ability to generate some kind of dedicateded addresses that aren't listed in address list at all.
Can I solve this problem anyhow?