scab·ble 
(skăbəl)
(skăbəl)tr.v. scab·bled, scab·bling, scab·bles
To work or dress (stone) roughly, preliminary to fine tooling.
[Middle English scaplen, from Old North French escapler, to dress timber : es-, off (from Latin ex-; see EX-) + capler, to cut (from Vulgar Latin *capulāre, *cappulāre).]