orotund (adj.)

in elocution, "characterized by strength, fullness, richness, and clearness," 1792, from Latin ore rotundo "in well-rounded phrases," literally "with round mouth" (see ore rotundo).

The odd thing about the word is that its only currency, at least in its non-technical sense, is among those who should most abhor it, the people of sufficient education to realize its bad formation; it is at once a monstrosity in its form & a pedantry in its use. [Fowler]