English	Deutsch
deficient /dɪˈfɪʃənt/ lacking something essential	mangelhaft ˈmaŋl̩ˌhaft
deficiency /dɪˈfɪʃənsi/ Insufficiency	der Mangel (Pl.: die Mangeln) {f} ˈmaŋl̩
acquired immune deficiency syndrome infectious disease caused by HIV	erworbenes Immundefektsyndrom
deficient number deficient number	defizienten Zahl
oxygen deficiency	die Hypoxie (Pl.: die Hypoxien) {f} hypɔˈksiː