expeditiously
adverb/ˌekspəˈdɪʃəsli/
/ˌekspəˈdɪʃəsli/
(formal)- in a way that works well without wasting time, money, etc.
- The work was carried out as expeditiously as possible.
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expeditiously
Definition of expeditiously adverb from the Oxford Advanced Learner's Dictionary