While you use "a/an" you need to use "en/ei/et", but when you use "the" you add "en" at the end of the verb.
Close. If you use en (i.e. the noun is masculine), add -en to the end of the noun. If you use ei (i.e. it's feminine), add -a. If you use et (i.e. it's neuter), add -et.
en fugl > fuglen
ei mark / en mark > marka / marken
et dyr > dyret
it's about the grammer.
en bjørn (a bear) vs bjørnen (the bear)
it's about learning when to use a word with "a" vs "the"
due to the language the use of the artical "the" is included in the full word.
Mannen (the man) En Mann (a man)
Jenta (the girl) en jente (a girl)
Kvinnen (the woman) kvinne (a woman)
you were correct with the word itself just not when to use the article word "the" vs "a" .... if that makes sense.