Dictionary.com
Thesaurus.com

hithermost

American  
[hith-er-mohst, -muhst] / ˈhɪð ərˌmoʊst, -məst /

adjective

  1. nearest in this direction.


hithermost British  
/ ˈhɪðəˌməʊst /

adjective

  1. rare nearest to this place or in this direction

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of hithermost

First recorded in 1555–65; hither + -most