purgatorial (adj.)

• apologetic
• ascetic
• chthonian
• chthonic
• cleansing
• devilish
• expiatory
• hellish
• infernal
• lustrative
• penitential
• propitiatory
• purgative
• purifying
• redeeming
• redemptive
• reparative
• reparatory
• repentant
• sulfurous