n. A state of proper physical condition; kilter or trim.n. One's mental state; spirits.n. Sand used to line a furnace.n. A person's mood or state, often assuming the worst.n. a seam line left by the meeting of mold pieces.n. The act of fettling.v. To sort out, to fix, to mend, to repair.v. To line the hearth of a furnace with sand prior to pouring molten metal.v. To be upset or in bad mood.v. In ceramics, to remove (as by sanding) the seam lines left by the meeting of two molds.v. To repair or tune a bicycle.v. (archaic) To prepare.