unidad
/uniˈdad/ · A2 · noun · f
unit of measurement
📏 unidad = uni (one) + -dad (-ity): one-ness, so both unit and unity
From Latin unitas, from unus (one). Spanish -dad matches English -ity (ciudad/city, calidad/quality), so unidad is literally unity. A unit is one single item, troop group, or measure; unity is the state of being one.