south ‧ ern ‧ most /ˈsʌðənməʊst $ -ərnmoʊst/ BrE AmE adjective
[ Word Family: adjective : ↑ south , ↑ southerly , ↑ southern , ↑ southbound , ↑ southernmost ; adverb : ↑ south , southward(s), ↑ southbound ; noun : ↑ south , ↑ southerner ]
furthest south:
the southernmost tip of India