ᴺS. !senc adj. and n. “mineral-like, flinty; flint” (Category: Rock, Stone)
A neologism for an adjective “mineral-like, flinty” and a noun “flint” coined by Paul Strack in 2019 specifically for Eldamo (with the noun sense added in 2021), the equivalent of Q. sinca “flint”, where the i became e via a-affection. It is derived from an adjective form of primitive ✶sinki, which may mean “mineral”; see that entry for details.