-K- is a horizontally symmetrical term. More symmetrical terms!
Definition of -K-
What does -K- mean?
- [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 [term, sc=unicode, -ed, lang=en] or [term, sc=unicode, -ing, lang=en]), so as to preserve its “hard” [IPAchar, [k]] sound (as opposed to [IPAchar, [s]]).