v. (past pl.)
'made fast, agreed upon'(Modern English fast)
The OE reflex of the wk. 1 v. PGmc *fastjan-, formed on the adj. *fasta-, consistently appears as fæstan with /æ/, and therefore ought to have produced ME fast- in most dial (and the adj. stem does occur as fast- in the Gaw MS). It is therefore possible that the vocalism of ME fest- shows some input from ON, where the i-mutation of PGmc /a/ regularly gives /ɛ/ in this environment, cp. OIcel festa ‘to fasten; hang up; fix, settle, stipulate’ (and further OFris festa, OS festian, OHG festan)(thus McGee 328, Oakden I.78, Knigge 76, TGD, GDS). But an OE variant *festan is possible and the doublet ME fest- vs. fast- is closely paralleled by ME kest- vs. kast- (see kest (v.)) and could similarly be explained as a raising of ME /a/ > /e/ before /s/ plus another consonant, or present vs. past alternation.
Proposed ON Etymon (OIcel representative)
festa ‘to fasten; hang up; fix, settle, stipulate’
(ONP festa (2) (vb.))
Other Scandinavian Reflexes
Far festa, Icel festa, Norw festa, Dan fæste, Sw fästa
fæstan 'to fasten, make firm, ratify, establish'
Phonological and morphological markers
[i-mutation] (possibly diagnostic)
ME fest- variants occur from c. 1300 onwards, and somewhat more regularly in N and E dial than elsewhere, though there are exceptions (e.g. c1300 Horn (LdMisc 108)).
Occurrences in the Gersum Corpus