(uncountable) Those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.

A hindrance; that which impedes or obstructs progress. / A disability, especially one affecting the hearing or speech. / (chiefly in the plural) Baggage, especially that of an army; impedimenta.

The act of impeding; that which impedes; a hindrance.

A test of the impact strength of a material, used to determine its relative ductility or brittleness. The test is executed by swinging a large, heavy hammer on a pendulum from a predetermined height. The hammer fractures the material sample, usually a block of a certain size with a notch cut in it. The height to which the pendulum swings is used to calculate the energy necessary to fracture the sample.

A small round confection having a hard sugar coat and a soft minty centre; sometimes given to customers at the end of a restaurant meal when they pay the bill.

The quality of being impatient; lacking patience; restlessness and intolerance of delays; anxiety and eagerness, especially to begin something.

Not penetrable. / (figuratively) Incomprehensible; fathomless; inscrutable. / Opaque; obscure; not translucent or transparent.

A person not openly given to friendship.

Having, or behaving as if having, too high of an opinion of one's own importance.

Very important; vital or crucial.