To accumulate, to pile up, to increase in stages.
To close up by building.
To strengthen.
In solitaire card games, to place a card over another card of lower value. (e.g., place 5♦ over 4♣)
To erect; to construct.
To gain richness; become heightened or intensified in brilliancy.
To make or render rich or richer.
To become rich or richer; become superior in quality, condition or effectiveness.