noun
wool
B1
Wolle (die) means 'wool' and refers to the textile fiber or yarn. It's a feminine, usually uncountable noun (material) with no distinct plural form in everyday use. Use 'die Wolle' for wool in general; not a verb. No declension irregularity beyond standard feminine forms.
Examples
Dieser Pullover ist aus reiner Wolle.
This sweater is made of pure wool.
Die Schneiderin kaufte Wolle, damit der Pullover warm wurde, obwohl das Geld knapp gewesen war.
The seamstress bought wool so that the sweater would be warm, although money had been scarce.
Die Wolle ist weich.
The wool is soft.
Details
Mnemonics
Imagine a fluffy sheep with a big label 'Wolle' on its fleece.
Sounds like English 'wool' which helps link the words.
Die (feminine): imagine a woman knitting with the wool — a female knitter holding 'die Wolle'.
Notes
Wolle is usually a mass (uncountable) noun in German (like 'wool' in English). You usually talk about 'die Wolle' rather than counting individual wools. | Singular-only noun; plural forms are not applicable.