User blog comment:Guardian Fira/Fighters Unite! Chapter 8: Round 1! Stardust VS Armoury/@comment-24517536-20140808065207/@comment-10483040-20140808121615

Nullify in term is to have an spell disabled

Like in yugioh you use a trap card and i use my trap to nullify it, it means the effect is stopped and the card is destroyed.