noun
arm, upper arm
A1
The noun 'Arm' means 'arm' (upper arm). Masculine (der Arm) with plural 'Arme'. Genitive singular adds -s (des Arms). Dative plural uses 'den Armen' (adds -n in plural). Use singular for one arm, plural for both arms. Declension follows standard masculine patterns.
Examples
Sie massiert ihren Arm nach dem Training.
She massages her arm after the workout.
Der Arzt verband den Arm, als der Patient gestern stürzte.
The doctor bandaged the arm when the patient fell yesterday.
Er bricht sich den Arm beim Skifahren.
He broke his arm while skiing.
Details
Mnemonics
picture your arm reaching for something
sounds like the English word 'arm'
der - think 'der Arm' (most body parts like der Kopf are often masculine)
Notes
Genitive singular commonly 'des Arms' or 'des Armes'. Very common basic noun.