When Ziz[0] meets Ziz[0],that is, Σ meets Σ

When Ziz[0] meets Ziz[0],that is, Σ meets Σ, it usually means three things:
Σ Ziz Vivoran harmonize Σ Ziz Vivoran, abbreviation is Σ HMY Σ
Σ Ziz Vivoran overwhelm Σ Ziz Vivoran, abbreviation is Σ OVL Σ
Σ Ziz Vivoran undermine Σ Ziz Vivoran, abbreviation is Σ UDM Σ