If Common Brittonic, not Old English, all related dictionaries show three suitable words beginning with Tre- and none with extremely rare Ter-.

[7] A close set of words (diversely conjugated and pronounced) in Old English is (f)irst(en), the meaning of which is as at present, first.

The river rises near the village of Ashe, 7 miles (11 km) to the west of Basingstoke (at grid reference SU 532,498), and flows west through the villages of Overton, Laverstoke, and the town of Whitchurch, before joining with the Bourne Rivulet at Testbourne and turning in a more southerly direction.

It then proceeds through the villages of Longparish and Middleton to Wherwell and Chilbolton, where the Rivers Dever and Anton join.

On the western edge of Romsey, Sadler's Mill, an 18th-century watermill, sits astride the River Test.

[9] South of Romsey, the river passes the country house of Broadlands, and then Nursling, once the site of a Roman bridge.

In the text, readers are told that this plan would not have been possible on most rivers, but the Test's smooth-flowing, weed-free nature makes it an exception.