noun
fruit
A1
'Obst' means 'fruit' as an uncountable mass noun (das Obst). It usually has no plural; talk about types with 'Obstsorten' or count fruits individually (ein Apfel). Genitive singular is des Obsts. Use like 'Ich kaufe Obst' not 'Obste'. It's neutral and singular in German.
Examples
Ich esse gern Obst.
I like to eat fruit.
Obst ist gesund und enthält viele Vitamine.
Fruit is healthy and contains many vitamins.
Die Marktfrau sagte, dass sie gestern viel Obst verkaufte, weil das Wetter schön war.
The market woman said that she sold a lot of fruit yesterday because the weather was nice.
Details
Mnemonics
A bowl full of apples and bananas labeled 'Obst'
das — imagine a neutral basket labeled 'das Obst' with mixed fruit
Notes
A two-usage preposition: used for destinations (to) and time (after). When used for directions it is used with place names often without an article; when used temporally it takes the dative. | Singular-only noun; plural forms are not applicable.