Sesquipedal is a unique and uncommon word that means "having many syllables; long-winded or verbose". Some synonyms for sesquipedal are loquacious, voluble, prolix, and garrulous. Loquacious refers to someone who talks a lot but not necessarily in a negative way. Voluble implies fluency, but sometimes a lack of substance or depth in the conversation. Prolix implies a tedious and extended speech, while garrulous denotes excessive and rambling talk. Other synonyms for sesquipedal include circumlocutory, palaverous, long-drawn-out, long-winded, and verbose. All these words describe a person or speech that is excessively wordy or long-winded, often to the point of being tedious.