lösa upp bedeutet auf Englisch

dissolve [dissolved, dissolving, dissolves]▼(transitive: to disintegrate into a solution by immersion)
verb
[UK: dɪ.ˈzɒlv] [US: ˌdɪ.ˈzɑːlv]

loosen [loosened, loosening, loosens]▼(to remove costiveness)
verb
[UK: ˈluːs.n̩] [US: ˈluːs.n̩]