0 indicates the subject of a letter or memo in business writing -- angående
1 indicates sth is done again -- gjen-
a satellite that has re-entered the atmosphere en satellitt som er kommet tilbake til atmosfæren
We repainted the door. Vi malte døren på nytt.
2 used at the beginning of a business letter or email to introduce the subject -- sv
3 (in some adjectives, adverbs, nouns, and verbs) again -- re-
reheated