fettle

noun

1. A state of physical condition; kilter or trim.

   “These strong 2-8-2s […] appeared in good fettle, especially those shedded at Lublin and several arrivals and departures were photographed in the fine evening light.”

2. One's mental state; spirits.
3. Sand used to line a furnace.
4. A seam line left by the meeting of mould pieces.
5. (UK, dialectal)The act of fettling.
6. (Cumbria, Geordie)A person's mood or state, often assuming the worst.

   “What’s yer fettle marra?”

verb

1. (Northern-England, especially)To sort out, to fix, to mend, to repair.

   “He is getting his saddle altered: fettling about this and that; does not consider what danger he is in.”

   “For some time after the train had gone Oscar stood on the track conversing with members of the fettling gang […]”

2. (intransitive)To make preparations; to put things in order; to do trifling business.

   “Nor list he now go whistling to the car, But sells his team , and fettleth to the war”

3. (transitive)To line the hearth of a furnace with sand prior to pouring molten metal.
4. (Geordie, reflexive)To be upset or in a bad mood.

   “Divint fettle yersel ower that!”

5. To remove (as by sanding) the seam lines left by the meeting of two molds.
6. (transitive)To machine away seam lines or more generally to make small adjustments to a component or machine to improve its fit or operation.

   “He wants to fettle his gearchange mechanism before the next competition.”

7. (archaic, transitive)To prepare.

   “But fettle your fine joints 'gainst Thursday next...”