Answer
The term for condition and pillar: Condition in language: it is the necessary sign, and from it the signs of the Hour: meaning its necessary signs. Condition in terminology: it is what the existence of something depends on, and it is outside the essence of the thing. Fakhr al-Islam said: it is a name for what existence depends on without obligation. Pillar in language: it is the stronger side, and he seeks refuge in a strong pillar, meaning: to honor and protection. Pillar in terminology: it is what the thing stands upon, and it is a part within the essence of the thing.