Definition from Wiktionary, the free dictionary
This interfix is strictly a written phenomenon, serving to indicate the preservation of a hard c.
- (chiefly in verb forms) Added after a word’s terminal ‘c’ when it is suffixed by a morpheme beginning in ‘e’, ‘i’, ‘y’, ‘æ’, or ‘œ’ (usually -ed or -ing), so as to preserve its “hard” [k] sound (as opposed to [s]).
- arcked, arcking
- frolicked, frolicking
- panicked, panicking, panicky
- picnicked, picnicker, picnicking
- trafficked, trafficking