expeditiously
[adverb]
Synonyms: fast, apace, flat-out, hastily, lickety-split, posthaste, quickly, rapidly, speedily, swiftly

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Antonyms: sluggishly
Contrasted words: ineffectively, deliberately, dilatorily, leisurely, slowly
Related Words: effectively, efficaciously, punctually

[TahlilGaran] English Synonym Dictionary ▲

ex‧pe‧di‧tious‧ly /ˌekspəˈdɪʃəsli, ˌekspɪˈdɪʃəsli/ adverb formal
in a quick and effective way Synonym : efficiently:
All issues presented to the court are considered as fairly and expeditiously as possible.
—expeditious adjective:
an expeditious system for examining claims for refugee status

[TahlilGaran] Dictionary of Contemporary English ▲