outermost

From Middle English uttermost, uttirmest, uttermast, outemast, alteration (due to Middle English outre (“outer”)) of Old English ūtemest, ȳtemest (“outermost”), equivalent to outer +‎ -most. Doublet of uttermost.

• (General American) IPA^(key): /ˈaʊtɚmoʊst/

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outermost

1. superlative form of outer: most outer

   Synonyms: (obsolete, rare) extimate, uttermost

   Antonym: innermost

   He lived on the outermost edge of the city.

• outermore

outermost (plural outermosts)

1. That which is outermost; the surface; the outside.
   • 1845, C. P. Bronson, Elocution, Or, Mental and Vocal Philosophy:

     Observe, the Analytical course is from outermosts to innermosts, from effects to causes […]