unwastefullyadv.
Etymology: Previous versions of the OED give the stress as: unˈwastefully.
the mind > possession > retaining > sparingness or frugality > [adverb] > not wastefully
1618 F. Bacon (1642) 15 15 lines in every sheet thereof written orderly and unwastfully.
This entry has not yet been fully updated (first published 1926; most recently modified version published online June 2019).