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Webster 1913 Edition

Adj.

Capable of being contrived, planned, invented, or devised.

A perpetual motion may seem easily

contrivable

Bp. Wilkins.

Adj.

[See Contrive.] That may be contrived; capable of being planned, invented, or devised.

Perpetual motion may seem easily contrivable.

contrivable ‎(not comparable)

Capable of being contrived, invented, or devised.
A perpetual motion may seem easily contrivable. — Bishop Wilkins.