Webster's Revised Unabridged Dictionary · 1913

Fettle

Fettle , transitive verb

[Old English & Prov. English, to fettle (in sense 1), fettle, n., order, repair, preparation, dress; prob. akin to English fit. See Fit, a.]

1.
To repair; to prepare; to put in order. [Provincial English] — Carlyle
2.
(Metallurgy) To cover or line with a mixture of ore, cinders, etc., as the hearth of a puddling furnace.

Fettle , intransitive verb

To make preparations; to put things in order; to do trifling business. [Provincial English] — Bp. Hall

Fettle , noun

The act of fettling. [Provincial English] — Wright
Collocations (1)
In fine fettle , in good spirits.