Question

which word is a synonym of glib?
deceptive
insincere
earnest
emotional

Explanation:

"Glib" means showing a ready flow of words but lacking sincerity or depth. "Insincere" means not expressing genuine feelings. So, "insincere" is a synonym of "glib". "Deceptive" means giving a false or misleading impression. "Earnest" means serious and sincere. "Emotional" means relating to emotions.

Answer:

insincere