Having no breadth or width; extremely narrow or lacking extent in one dimension.
From 'breadth' (Old English 'bræd' + -th) plus the suffix '-less' (Old English '-leas' meaning without). This descriptive term emerged in technical and philosophical contexts.
Mathematicians and philosophers loved 'breadthless' to describe one-dimensional objects like lines—it's the kind of precise word that helps you think clearly about abstract concepts.
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