lithify

lithify [lith-uh-fahy] Word Origin verb (used with object), lith·i·fied, lith·i·fy·ing.

1. to change (sediment) to stone or rock.

verb (used without object), lith·i·fied, lith·i·fy·ing.

2. to become lithified.

Origin of lithify lith- + -ify