Proto-MSA

*ˁibal - flint (Kogan 2015:548)

The etymology is uncertain. Consider Arb. ˀaˁbal ‘a mountain of which stones are white; rough, rugged thick stone which may be red, black or white’. (See Kogan 2015:548 for more detail).

Mehri
ˀáybəl - flint (ML 10)
Jibbali
ˁayέl - flint (JL 6)
Soqotri
ˁíbhaḷ - flint (LS 293)