v. (pres. 3 sg.)
'burns (up)'(Modern English swid)
Always derived from ON, cp. OIcel svíða 'to singe, burn'. No cognates are known outside of the Scandinavian languages. Kroonen suggests it represents a full-grade variant of *sweþan-, represented by OHG swedan 'to burn (with smoke)' (see also Mag. for further connections).
Proposed ON Etymon (OIcel representative)
svíða 'to singe, burn'
(ONP svíða (1) (vb.))
Other Scandinavian Reflexes
Far svíða, Icel svíða, Norw svida, ODan swide, Dan svide, svie, OSw svidha, Sw svida
Phonological and morphological markers
Citations in MED and OED begin with a1300(a1250) Bestiary (Arun 292) and are mostly from N/EM texts. In MnE N dial, swid 'to smart' (OED, EDD)
Occurrences in the Gersum Corpus