feeble-minded

Imbecile is a synonym of feeble-minded.

As adjectives the difference between imbecile and feeble-minded

is that imbecile is (dated) destitute of strength, whether of body or mind; feeble; impotent; especially, mentally weak while feeble-minded is weak in intellectual power; wanting firmness or constancy; lacking intelligence; irresolute; vacillating; imbecile.

As a noun imbecile

is (obsolete) a person with limited (l) (l) who can perform (l) and think only like a young child, in medical circles meaning a person who lacks the capacity to develop beyond the mental age of a normal five to seven-year-old child.

Feeble is a related term of feeble-minded.

As adjectives the difference between feeble and feeble-minded

is that feeble is deficient in physical strength; weak; infirm; debilitated while feeble-minded is weak in intellectual power; wanting firmness or constancy; lacking intelligence; irresolute; vacillating; imbecile.

As a verb feeble

is (obsolete) to make feeble; to enfeeble.

As adjectives the difference between weak and feeble-minded

is that weak is lacking in force (usually strength) or ability while feeble-minded is weak in intellectual power; wanting firmness or constancy; lacking intelligence; irresolute; vacillating; imbecile.