'angulateness' originates from Latin, specifically the root 'angul-' from 'angulus,' where 'angulus' meant 'angle,' combined in English with the suffix '-ness' added to related forms like 'angular/angulate.'

'angulus' influenced Medieval Latin and Old French forms leading into Middle English 'angular' and later 'angulate'; adding the English suffix '-ness' eventually yielded the modern English noun 'angulateness'.

Initially, it meant 'the state of having angles,' and later broadened to include figurative senses of a thin, sharp-lined appearance or stiffness in style.