Firth
noun
a long narrow estuary (especially in Scotland)
Origin
From Middle English fyrth, a metathetic variant of frith (“forest”), from Old English fyrhþe, fyrhþ (“forest, wooded country; game preserve, hunting ground”), from Proto-West Germanic *furhiþi (“forest, woodland”), Proto-Germanic *furhiþją (“forest, wooded country”), *furhiþǭ, from *furhu (“fir; pine”), from *furahō, *furhō (“fir; pine; (fir or pine) forest”), from Proto-Indo-European *pérkus (“oak”), from *perkʷ- (“oak”).
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.