Romams 2:4-5 — Or despisest thou the riches of His goodness and forbearance and longsuffering; not knowing that the goodness of God leadeth thee to repentance?
But after thy hardness and impenitent heart treasurest up unto thyself wrath`against the day of wrath and revelation of the righteous judgment of God.
Goodness = kindness
Forbearance = willingness to tolerate, withholding punishment
Longsuffering = patience which continues forgiving until the hope of repentance is gone
Not knowing — willful ignorance
Repentance = a change of mind
Treasurest up = stockpile God's wrath by impenitence
In other words — Are you ignoring and sneering at God's patience with your sins? Don't you know that His patience is intended to show you your need to turn to Him? The more you ignore Him, the greater will be your punishment.