erə- / Indo-European roots
To row.Oldest form *h1erh1-.
1. Variant form *rē- (contracted from *reh1-, from earlier *h1reh1-).
a. row2 from Old English rōwan, to row, from Germanic *rō-;
b. suffixed form *rō-tro-. rudder, Rus, Russian, Russky from Old English rōther and Old Norse rōdhr, steering oar, both from Germanic *rōthra, rudder;
c. suffixed form *rē-smo-. bireme, remex, trireme from Latin rēmus, oar.
2. Oldest variant form *h1reh1- becoming *erē- in Greek. trierarch from Greek triērēs, trireme.
[Pokorny 1. erə- 338.]