not meeting requirements; "unequal to the demands put upon him"
(followed by `of') lacking capacity or ability; "incapable of carrying a tune"; "he is incapable of understanding the matter"; "incapable of doing the work"
(followed by `of') not having the temperament or inclination for; "simply incapable of lying"
lacking the necessary skill or knowledge etc.; "an incapable helper"
directed or facing toward the back or rear; "a backward view"
(used of temperament or behavior) marked by a retiring nature; "a backward lover"
retarded in intellectual development
in a manner or order or direction the reverse of normal; "it's easy to get the `i' and the `e' backward in words like `seize' and `siege'"; "the child put her jersey on backward"
affected by a disorder of the mind; "a mental patient"; "mental illness"
involving the mind or an intellectual process; "mental images of happy times"; "mental calculations"; "in a terrible mental state"; "mental suffering"; "free from mental defects"
of or relating to the chin- or liplike structure in insects and certain mollusks
of or relating to the mind; "mental powers"; "mental development"; "mental hygiene"