Fettle (verb)

1. To put in good condition.
2. To fix or repair.

Origin:

Old english fetel "fetter, shackle", probably of germanic origin.

Examples:

1. He set to work to fettle the old engine.
2. She spent the afternoon fettling her bicycle before the race.
3. The mechanic spent hours fettling the car before the rally.
4. I need to fettle my tools before starting the project.
5. I spent the morning fettling the garden.