runo-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly.
Origin: Formed within English, by compounding. Etymons: rune n.2, -o- connective.
Etymology: < rune n.2 + -o- connective.Found in a small number of formations in the 19th cent.
This entry has been updated (OED Third Edition, March 2011; most recently modified version published online March 2018).