noun
cosmetics, beauty products
A2
Kosmetik: means cosmetics or beauty products and can refer to the cosmetics industry or cosmetic treatment. Often used as a mass noun (die Kosmetik). Plural form Kosmetika exists for distinct items. Note the gender is feminine (die); no special prepositions or reflexivity. Unusual plural: Kosmetika.
Examples
Sie kauft Kosmetik im Drogeriemarkt.
She buys cosmetics at the drugstore.
Sie arbeitet in der Kosmetikbranche.
She works in the cosmetics industry.
Die Apotheke verschenkte Proben der Kosmetik, weil viele Kunden danach fragten.
The pharmacy gave away samples of the cosmetics because many customers asked for them.
Details
Mnemonics
Imagine a shelf full of bottles labeled 'Kosmetik'
Sounds like 'cosmetic' in English
Die Kosmetik — think of feminine 'die' for personal care items
Notes
Kosmetik is often used as a mass noun (cosmetics). In some contexts plural 'Kosmetika' is possible but rare.