From π°π½π³π°πΏπ²πΉ (andaugi, βcountenanceβ) +β -π±π° (-ba, βadverb-forming suffixβ) or from a closely related (unattested) adjective with the same suffix.
π°π½π³π°πΏπ²πΉπ±π° β’ (andaugiba)