Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases. Many structural alloys corrode merely from exposure to moisture in air, but the process can be strongly affected by exposure to certain substances. Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area more or less uniformly corroding the surface.
foe. 1. a person who feels enmity, hatred, or malice toward another; enemy: a bitter foe. 2. a military enemy. 3. an opponent in a game or contest; adversary: a political foe. 4. a person who is opposed in feeling, principle, etc., to something: a foe to progress. 5. a thing that is harmful to or destructive of something.
What is Adversary? Definition and meaning:ADVERSARY ad'-ver-sa-ri, ad'-ver-sa-ri: This word (in the singular or plural) is used in the Old Testament to render different Hebrew words. In thirty-two cases the word corresponds to the noun tsar, or the verb tsarar. This noun is the ordinary word for foe or adversary. In twelve passages the Hebrew word, of which adversary is the translation, is saTan = noun or saTan = verb. This stem means to oppose, or thwart anyone in his purpose or claims. The angel of Yahweh was saTan to Balaam (Numbers 22:22).