Impregnable means incapable of being taken by assault. Although they tried to attack the castle, the enemies found our castle walls to be impregnable, so they stopped their attack before nightfall.
Made out of concrete and lead, the fallout shelter seemed impregnable. They built stout castles in the middle ages believing them impregnable, until gunpowder came into use.
'Would you like this candy or these desserts to follow the meal?'This is being used as an indicator for a singular item, and these is being used as an indicator for multiple items.See the related...
Use it's (with the apostrophe) only when you mean "it is" or "it has." For example: It's time to go. (It is time to go.)It's been a long time. (It has been a long time.) Use its (without the...