mancuerna bedeutet auf Englisch

cufflink▼(button used to hold a sleeve cuff together)
noun
[UK: ˈkʌ.flɪŋk] [US: ˈkʌ.flɪŋk]

dumbbell [dumbbells]▼(a weight with two disks attached to a short bar)
noun
[UK: ˈdʌm.bel] [US: ˈdʌm.ˌbel]