Why is the ninth month called September?
"condition, state, trim," c.1750, Lancashire dialect, from fettle (v.) "to make ready, arrange" (14c.), perhaps from Old English fetel "a girdle, belt," from Proto-Germanic *fatiloz (cf. German fessel "fetter, chain," Old Norse fetill "strap, brace"), from *fat- "to hold."
fettle fet·tle (fět'l)
Proper or sound condition.
Mental or emotional state; spirits.