Ma'anar ƙamus na "diction forge" hanya ce ta ƙirƙira ƙarfe ta amfani da guduma mai nauyi ko latsa don siffata ƙarfe mai zafi tsakanin mutu biyu. Ana amfani da wannan tsari sosai wajen kera sassan ƙarfe don masana'antu daban-daban, kamar motoci, sararin samaniya, da gine-gine. Kalmar “digo” a cikin jujjuyawar ƙirƙira tana nufin motsin guduma ko latsa a tsaye, wanda ke faɗowa kan ƙarfe da ƙarfi don siffanta shi. Samfuran da ake samu galibi sun fi ƙarfi da ɗorewa fiye da waɗanda wasu hanyoyin keɓan ƙarfe ke samarwa.