The nouns which come in degrees like קודש, חול, טמא, טהור (holy, secular, unclean, clean) – there are in them several levels.

For example, קדשי הקדשים (Holy of Holies) has a holiness just above קדשים קלים (offerings of a lesser sanctity) and קדשים קלים has a holiness just above תרומה (donations), and תרומה just above מעשר (tithes), where the lower level is profane compared with the higher level. And moreover, stringent uncleanness is more profane than lenient uncleanness, and lenient uncleanness is clean compared with it. And it is always necessary to focus on topics in the Scripture from the perspective of the level in which it is speaking.

And moreover, the noun זר (foreign) – is a preposition and is said in reference to something else.