jāxīsse
By itself, jāxīsse tends to mean horizon. But it is a little more subtle than that. It means something like the natural boundary line between two domains. So, anālhāri jāxīsse is a reference to the land/sea boundary. It appears in the sentence with the modifier jīlke, which I will discuss tomorrow.
temme ē jaþēλi ien jakā ānen ansāorīki ien jaxūna ānen anrūēli ī xiēn jē jāxīsse jīlke ī jāo ja la sūjatā ē jāo sūjōl ien jiēxa ānen jasēsi ī jōrrisi ē jatatēn ien ñi jīlkena cē jaþārre ōrra ē jawāññerāñi jīþi nā ī;
He said to him the ideas: the doings of consonants; the pattern of vowels, …