The compound adjective 'three-bladed' is a modern English formation built from native Germanic elements. Its first component, 'three', descends from the Proto-Indo-European root trei-, a fundamental numeral that gave rise to equivalents across many languages. The second element, 'blade', originally meant 'leaf' in Old English, a meaning preserved in words like 'blade of grass'. Its semantic evolution to mean the flat cutting edge of a tool reflects a metaphorical shift based on shared shape and thinness. The suffix '-ed' is then attached to the noun 'blade', converting it into an adjectival form meaning 'provided with', a pattern common in English (e.g., 'winged', 'bearded'). Thus, the word's logic is transparently literal: describing an object characterized by having three flat cutting or striking parts.

Structure: three (number) + blade (cutting part) + ed (adjective suffix) - three: From Old English þrīe, of Germanic origin; related to Dutch drie and German drei, from an Indo-European root shared by Latin tres and Greek treis. Functions as a numerical quantifier. - blade: From Old English blæd 'leaf, flat part', of Germanic origin. Functions as the core noun denoting the flat, cutting part of a tool or weapon. - ed: A productive English suffix forming adjectives from nouns, indicating 'having' or 'characterized by'. Of Germanic origin.