A contradiction

Ostler jocosely said to be derived from oat-stealer, but actually from the French hostelier, an innkeeper.

hos[tler 7h9s4l!r, 9s$38
n.
5contr. of HOSTELER6
1 a person who takes care of horses at an inn, stable, etc.; groom
>2 a person who services a truck or a railroad engine at the end of a run
3 [Obs.] an innkeeper