the word 'tallness' is a transparent english compound formed from the native germanic adjective 'tall' and the nominalizing suffix '-ness'. the adjective 'tall' has an intriguing semantic history, originating from a proto-germanic root meaning 'swift' or 'ready', which evolved in middle english to signify 'handsome' or 'brave' before specializing to its current primary meaning of 'high in stature'. the suffix '-ness' is one of the most productive and ancient noun-forming elements in english, directly descended from a common germanic suffix used to create abstract nouns indicating a state or condition. therefore, the literal construction 'tallness' logically and directly denotes 'the state or condition of being tall', with its morphological logic remaining perfectly clear and intact from its old english predecessors to modern usage.

Structure: tall (of great height) + ness (state or quality) tall: from middle english 'tal', meaning 'swift, ready, goodly'. of germanic origin; related to old english 'getæl' (swift, ready) and old high german 'gizal' (quick). its modern sense of 'high in stature' developed in the late 16th century. in this word, it functions as the adjectival root describing the attribute of height. ness: from old english '-nes', '-nis', a suffix forming abstract nouns of state or quality. of germanic origin; related to old saxon '-nissi', old high german '-nissa'. it functions as a nominalizing suffix, converting the adjective into a noun denoting the condition or quality.