Word

敷衍

布衍、敷延
ふえん
expatiation; amplification (upon); elaboration
Word

蔓延

まん延、蔓衍
まんえん
spread (e.g. of a disease); rampancy; infestation; proliferation; being widespread
Word

衍字

えんじ
(inadvertent) insertion of a character in a text
Word

衍文

えんぶん
(inadvertent) redundancy in a text