overest
/ˈəʊv(ə)rɪst/adjective
Highest in position, uppermost; outermost, covering all the rest; farthest away. Now Newfoundland and rare.
Origin
Middle English; earliest use found in Statutes of the Realm. Superlative of over. Compare Old High German obarōst, adverb, obarōsto, adjective (Middle High German oberest, adjective, German oberst (adjective) highest, Oberst (noun) superior, colonel).