- glib - marked by lack of intellectual depth; "glib generalizations"; "a glib response to a complex question"
Antonym: profound (indirect, via superficial)
- glib, pat, slick - having only superficial plausibility; "glib promises"; "a slick commercial"
Antonym: implausible (indirect, via plausible)
- glib, glib-tongued, smooth-tongued - artfully persuasive in speech; "a glib tongue"; "a smooth-tongued hypocrite"
Antonym: dissuasive (indirect, via persuasive)