noun
work permit, employment permit
B1
Arbeitserlaubnis means 'work permit' or 'employment permit'. It's a feminine noun (die Arbeitserlaubnis) with plural Arbeitserlaubnisse and standard declension forms. Not irregular. It denotes an official authorization issued by authorities allowing someone to work in a country, commonly required for foreign nationals or migrants.
Examples
Für die Arbeit in diesem Land benötigt man eine gültige Arbeitserlaubnis.
For work in this country, one needs a valid work permit.
Sie hat die Arbeitserlaubnis letzte Woche bekommen.
She received her employment permit last week.
Der Konsul verlängerte die Arbeitserlaubnis, obwohl die Prüfung noch nicht abgeschlossen war.
The consul extended the work permit even though the review was not yet completed.
Details
Mnemonics
Picture a stamped permit with the words 'Arbeitserlaubnis' across it.
die -> think 'she' (feminine). 'die Arbeitserlaubnis' (notice the -nis ending often feminine here).
Notes
Official document required in many countries for foreign nationals to work. Common in immigration and HR contexts.