Sesquipedalian n. One who is inordinately infatuated with polysyllabic obfuscation, preferring never to employ a less complicated syntactic arrangement of descriptive words when there exists a single expressive unit that amalgamates the multiplicity of morphemes¹ comprising the simpler phrase. Among the manifold objectives of multisyllabic, holophrastic² verbalism are those of: rendering the author's meaning indisputably precise yet simultaneously incomprehensible; demonstrating through superior orthography and lexical awareness that the writer is manifestly more erudite than the reader; disempowering intellectual challenge to the proponent's argument by using logomachinations³ to divert discussion to the establishment of the opponent's comprehension of the vocabulary as opposed to addressing the factual import of the treatise which, upon analysis, may well prove amphigorous⁴. The obscurantist⁵ sesquipedalian is likely to compound the reader's difficulties by indulging in glossosynthesis⁶, thus enabling the author to dismiss all opposing views as ultracrepidarious⁷. In other words, a sesquipedalian is one who would call a spade a manuo-pedal excavationary implement⁸.

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¹ Linguistic units of relatively stable meaning that cannot be divided into smaller meaningful parts, such as whole words like god, word-forming elements like -ly as found in godly, or grammatical inflections like the plural ending -s on gods. [Source: Reader's Digest Universal Dictionary].
² Single words that can be used instead of a whole phrase, or that convey a set of ideas.
³ Arguments about meanings of words.
⁴ Text which appears at first to be meaningful, but upon examination is found to be nonsense.
⁵ Person with a tendency to oppose or impede investigation or the progress of knowledge.
⁶ Invention of nonsense words.
⁷ Acting or speaking beyond the sphere of actual knowledge or experience; ignorant criticism.
⁸ A spade.