east ‧ ern ‧ most /ˈiːstənməʊst $ -ərnmoʊst/ BrE AmE adjective
[ Word Family: adjective : ↑ east , ↑ easterly , ↑ eastern , ↑ eastbound , ↑ easternmost , ↑ eastward ; noun : ↑ east , easterner, ↑ easterly ; adverb : ↑ east , eastward(s)]
furthest east:
the easternmost part of the country