inmost

From Middle English inmost, from Old English innemest, a double superlative form from inne (“within”), from in (“in”). The modern form is due to confusion with most.

inmost (not comparable)

1. The very deepest within; farthest from the surface or external part; innermost
   • 1905, Francis Lynde, A Fool for Love, The Bobbs-Merrill Company, Indianapolis, page 25:

     Virginia Carteret was finding it a new and singular experience to have a man tell her baldly at their first meeting that he had read her inmost thought of him.

   • 1918, Edgar Rice Burroughs, The Gods of Mars‎, HTML edition, The Gutenberg Project, published 2008:

     It was as though she were attempting to read my inmost soul, …

inmost (plural inmosts)

1. That which is innermost; the core.

• inmost in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.

• monist, omnist