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Such as can be mounted.

Capable of being dismounted; -- said of a form of rim, for an automobile wheel, which can be removed with its tire from the wheel.

Incapable of being passed over, surmounted, or overcome; insuperable; as, insurmountable difficulty or obstacle. Locke. Hope thinks nothing difficult; despair tells us that difficulty is insurmountable. I. Watts.

The state or quality of being insurmountable; insurmountability.

Capable of being surmounted or overcome; superable. -- Sur*mount"a*ble*ness, n.

Insurmountable. Locke.

Surmountable; superable. [Obs.] Johnson.

Not capable of being passed over; insuperable; insurmountable.

Incapable of being passed over or surmounted; insurmountable; as, insuperable difficulties. And middle natures, how they long to join, Yet never pass the insuperable line Pope. The difficulty is enhanced, or is . . . insuperable. I. Taylor.

The state or quality of being insurmountable.

Capable of being overcome or conquered; surmountable. Antipathies are generally superable by a single effort. Johnson. -- Su"per*a*ble*ness, n. -- Su"per*a*bly, adv.

s. -- Switch back (Railways), an arrangement of tracks whereby elevations otherwise insurmountable are passed. The track ascends by a series of zigzags, the engine running alternately forward and back, until the summit is reached. -- Switch board (Elec.), a collection of switches in one piece of apparatus, so arrange…