When Ziz[1] meets Ziz[0],that is, Δ meets Σ

When Ziz[1] meets Ziz[0],that is, Δ meets Σ, it usually means three things:
Δ Ziz Vivorin harmonize Σ Ziz Vivoran, abbreviation is Δ HMY Σ
Δ Ziz Vivorin overwhelm Σ Ziz Vivoran, abbreviation is Δ OVL Σ
Δ Ziz Vivorin undermine Σ Ziz Vivoran, abbreviation is Δ UDM Σ