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Webster 1913 Edition

Adj.

Capable of being bored.

[R.]

Adj.

[See Bore.] That may be bored. [Little used.]

borable ‎(comparative more borable, superlative most borable)

Alternative form of boreable
- 1927, Pit & Quarry (volume 15, issues 1-5, page 69)
  A borable and nailable concrete is obtained by first mixing 1 part of lime and 16-18 parts sand to form a lime mortar, and this is ground before it has completely set and then mixed with one part of cement.