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Use "trisyllables" in a sentence
"_Monosyllables_ are generally compared by adding _er_ and _est; dissyllables, trisyllables_, &c. by _more_ and _most_; as, mild, milder, mildest; frugal, more frugal, most frugal; virtuous, more virtuous, most virtuous."
"Place-names -- such as Béjar (p. 58) and Córdoba (p. 184) -- are accentuated; so are trisyllables and polysyllables such as Góngora (p. 209) and Zúñiga (p. 57 and elsewhere)."
"Monosyllables, dissyllables, and trisyllables had each their distinct time."