From G2545 (kaio, 'to burn/set alight'). Kausis refers to the act or process of burning โ consuming by fire. It appears in Hebrews in a warning about the destiny of fruitless ground.
Hebrews 6:7โ8 presents a parable of two fields: ground that drinks rain and produces useful crops receives blessing; ground that produces thorns faces kausis โ burning. This agricultural image warns against the spiritual condition of unfruitfulness despite exposure to God's word and blessings. The burning is not merely punitive but also purgative โ clearing what is dead to make way for new growth. John the Baptist declared that Christ would 'burn up the chaff with unquenchable fire' (Matt. 3:12), while Paul asserts that each person's work will be tested by fire (1 Cor. 3:13). The eschatological fire ultimately distinguishes what is genuine from what is worthless.