בְּעַיִן יָפָה
The proper term for generosity is נְדִיבוּת, but the most commonly-used term that describes giving generously suggests that when a person feels generous, they see and appreciate the beauty in the world: to give generously is לָתֵת בְּעַיִן יָפָה
– literally, to give with a beautiful eye.
For example:
אֲנַחְנוּ מְבַקְּשִׁים לָתֵת בְּעַיִן יָפָה לְמַעַן הַמַּטָּרָה הַחֲשׁוּבָה הַזֹּאת.
We ask that (you) give generously for this important cause (goal).