The Greek word for blessedness — not emotional happiness dependent on circumstances, but the deep well-being of those who are right with God. The Beatitudes (Matt 5) open with makarios.
Makarios was used in Greek of the gods who lived free from human troubles, and of the dead who were beyond earthly care. Jesus redefines it entirely — the blessed are the poor in spirit, the mourning, the persecuted.
The Beatitudes reverse every worldly measure of blessing. Jesus declares the mourning, the meek, the persecuted to be makarios — blessed beyond those the world counts happy. Paul's citation of Ps 32 in Romans 4 applies makarios to justification.