E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Saxon out, as Utoxeter, in Staffordshire; Utrecht, in Holland; outer camp town; the out passage, so called by Clotaire because it was the grand passage over or out of the Rhine before that river changed its bed. Utmost is out or outer-most. (See UTGARD.)
Strain at [ut. out] a gnat, and swallow a camel.Matt. xxiii. 24.