The definition of plain is clearly understood, obvious, simple or not complicated.
Unposed and informal
Not complimentary; derogatory.
Attractive or good-looking; that makes one look good.
Free from reserve, disguise, or guile; clearly evident; plain
Find another word for unflattering. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for unflattering, like: plain, candid, blunt, critical, frank, uncomplimentary, flattering, effeminate, unsubtle and unconvincing.