Wrath — divine or human anger that is settled and purposeful, not explosive passion. The NT's teaching on God's wrath (Rom 1:18) must be understood in light of his justice and righteousness, not human rage.
Paul's theology in Romans 1-3 argues that God's wrath (orge) is revealed against all unrighteousness — it is the negative side of his holiness, the necessary response of a just God to sin.
The same God who is love (1 John 4:8) is the God whose orge is revealed. These are not contradictions but aspects of his perfect character. The cross is the place where God's wrath and God's love meet — satisfying both.