Arīhatatta in phrase "arīhatta ariyo hoti" at A iv.145 is wrong reading for arīnaŋ hatattā. The whole phrase is inserted by mistake from a gloss explaining arahā in the foll. sentence "ārakattā kilesānaŋ arīnaŋ hatattā . . . arahā hoti", and is to be deleted (omitted also by SS).

Pali-English Dictionary, TW Rhys Davids, William Stede,