From ander (“second”) and halb (“half”), meaning something like 'half way to the second number'. This word is the single surviving form of an older system to describe fractions, which counted from the higher ordinal number rather than the lower cardinal. Compare Middle Low German anderthalf. The word ander has since lost the meaning 'second', being used solely as 'other' in modern German.
- IPA(key): /andərthalb/, [ˈɑndɐtʰˈhɑlpʰ], [ˈandɐtʰˈhalpʰ] (most of Germany, some of Austria)
- IPA(key): /andərthalb/, [ˈɑnd̥ərtˈhɑlb̥] (Switzerland, some of Austria and southern Germany)
- anderthalb in Duden online