southmost

[ south-mohst or, esp. British, -muh st ]

/ ˈsaʊθˌmoʊst or, esp. British, -məst /

Origin of southmost

before 900; Middle English southmest, Old English sūthmest; see south, -most

The shorter diagonal, from northmost base of Ziscaberg to southmost of Hradschin, is perhaps a couple of miles.

History of Friedrich II. of Prussia, Vol. XVIII. (of XXI.) |Thomas Carlyle
It was necessary, if F12A was to be held by us, that the southmost stretch of F13 should be cleared of the enemy.

The Fifth Battalion Highland Light Infantry in the War 1914-1918 |F.L. Morrison
Sandy went to the door and knocked, and in a little while one answered at the southmost of the windows.

The Men of the Moss-Hags |S. R. Crockett
The ocean lay unruffled along the rocky headlands of Ireland's southmost shore.

The Great Lone Land |W. F. Butler

Most is sometimes added to a substantive, as, topmost, southmost.

A Grammar of the English Tongue |Samuel Johnson