As adverbs the difference between speedily and swith
is that speedily is in a speedy or fast manner while swith is (dialectal|or|obsolete) quickly, speedily, promptly.
As an adjective swith is
(dialectal|or|obsolete) strong; vehement.
speedily
English
Adverb
(en-adv)
In a speedy or fast manner.
Synonyms
* See also
swith
English
Etymology 1
From (etyl) (m), from (etyl) . Related to (l).
Adjective
(er)
(dialectal, or, obsolete) Strong; vehement.
Etymology 2
From (etyl) (m), (m), from (etyl) . Not cognate to superficially similar (m), as these have distinct PIE roots, though both share *swe- prefix in PIE.
Alternative forms
* (l)
Adverb
(er)
(dialectal, or, obsolete) Quickly, speedily, promptly.
(dialectal, or, obsolete) Strongly; vehemently; very.