|Origin:||lavish 'too great quantity' (15-16 centuries), from Old French lavasse 'heavy rain', from laver 'to wash'|
large, impressive, or expensive:
a royal palace on a lavish scale
The food was lavish.
We were always lavish with financial aid in times of crisis.
He was always lavish in his praise of my efforts.
their lavishly illustrated catalogue
—lavishness noun [uncountable]