travelled, vis, ss, certain, but vi·s wise, Me·n injury, but men, nn, but; a vowel followed by a single m is short except in E·m vapor.
145. A vowel before a single final k, p, t as a rule is short, the consonant then being pronounced long ; Ex.: Tak, kk, thanks, Hop, pp, jump, Hat, tt, hat.
Exceptions are some specific Norwegian words which have never been accepted into the Danish literature and therefore never have been spelled in accordance with Danish pronunciation: Aat food of fishes, Laat sound (=Danish Lyd), laak (being) in poor healt, Raak a lane of water through the ice, Löp a kind of wooden box.
Note. In compound words the component parts retain their original quantity; Ex.: Tog-tabel a Railroad time table, Mod-stand (pr. Mot-stand) opposition.
146. A consonant is always long after a stressed short vowel; when an unstressed vowel follows then the consonant is written double; Hul hole, plur. Huller, Suppe soup, Smör butter (Smörret the butter).
Note 1. It will be seen from the above examples that if during the inflection of words ending in a single consonant with a preceding short vowel the consonant comes before a termination commencing in a vowel then the consonant is written double.
Note 2. Some foreign words retain their original spelling but are pronounced in accordance with the above rule; Ex.: Artikel (pr. artik-kel) article, Amen (pr. Ammen), Titel (pr. Tittel) title. A consonant written double after an unstressed vowel is pronounced short; Ex.: Tallerken (pr. Tale‘rken) plate, Parallel (pr. Parale‘ll).
Note 3. A consonant is not written double before another consonant even if it be long; Ex.: gammel old, plur. gamle (pr. gammle); except in compound words: Ex.: Manddrab homicide (Mand-drab). A long consonant is not as a rule written double at the end of words, except in a few cases to avoid ambiguity; Ex.: viss certain, to distinguish it from vi·s wise.