ombro-comb. form
Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g.
ombrograph n.Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ὄμβρος , -o- connective.
Etymology: < ancient Greek ὄμβρος shower of rain (cognate with classical Latin imber rain: see imbrid adj.) + -o- connective.Earliest in an isolated attestation in the first half of the 18th cent. (see ombrometer n.), and from the first half of the 19th cent. in a small number of English formations and adaptations of German words (compare ombrophilous adj.1, ombrophobic adj., and ombrophobous adj.). Compare German ombro- (occasional formations in which are found from at least the end of the 19th cent.), French ombro- (occasional formations in which are found from at least the beginning of the 19th cent.). Combined with second elements ultimately of Greek origin. The position of the stress differs between compounds of ombro- in accordance with the general stress patterns of English.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online September 2019).