Ath-Thartharun (most voluble) is the plural of Tharthar which comes from the word Thartharah, meaning to speak repeatedly in an artificial manner. Mutashaddiqun (loud-mouthed) is the plural of Mutashaddiq, which means a person who speaks loudly to display his eloquence. Mutafaihiqun is the plural of Mutafaihiq which is from the word Fihq, meaning to fill. This Hadith is a reference to those people who speak in a loud and lofty manner. All these characteristics of speech are indicative of artificiality and affectation which are condemned by Shari'ah, and people having these defects will be far away from the Prophet (PBUH) and will face the Wrath of Allah. Islam likes simple, polite and natural style of conversation. In fact, all moral virtues will be a means of the nearness of the Prophet (PBUH) and the Pleasure of Allah. May Allah enable us to adopt these virtues.