Rebracketing of ⲑⲁⲗⲁⲥⲥⲁ (thalassa), with the /t/ in ⲑ reanalysed as the feminine singular definite article ⲧ- (t-).
ϩⲁⲗⲁⲥⲥⲁ • (halassa) f (plural ϩⲁⲗⲁⲥⲥⲁ (halassa))