Mid 17th century; earliest use found in Thomas Blount (1618–1679), antiquary and lexicographer. From classical Latin plāniloquus + -ent; compare -loquent.
Definition of planiloquent in US English:
planiloquent
adjective
rare
Blunt, plain-speaking.
Origin
Mid 17th century; earliest use found in Thomas Blount (1618–1679), antiquary and lexicographer. From classical Latin plāniloquus + -ent; compare -loquent.