noun
specialist, expert
B1
Spezialist (der) means 'specialist' or 'expert'. It's a masculine noun with plural Spezialisten. It follows weak declension: singular oblique forms add -en (den/dem/des Spezialisten) and the plural is die Spezialisten. Use definite article der in nominative singular. Not a verb; no preposition required.
Examples
Sie ist eine anerkannte Spezialistin auf diesem Gebiet.
She is a recognized expert in this field.
Der Spezialist hat das Problem schnell gelöst.
The specialist solved the problem quickly.
Für diese komplizierte Operation brauchen wir einen Spezialisten.
For this complicated operation, we need a specialist.
Details
Mnemonics
picture a person with a badge that says 'Spezialist' wearing a lab coat or tools
sounds like English 'specialist' — identical root
der Spezialist — 'der' (masculine): imagine a male expert being introduced as 'der Spezialist'
Notes
Many '-ist' nouns follow the weak declension pattern (Spezialist → Spezialisten). Female form is 'Spezialistin'.