[tlhIngan Hol] {neH} as in "the only"

puq neH ghaH he is only a child But why can't it mean too "he is the only child", as in "the only child of two parents"? Similarly, we have the {jonta' neH} for "only the engine". But why can't it mean too "the only engine"? -- Dana'an https://sacredtextsinklingon.wordpress.com/ Ζεὺς ἦν, Ζεὺς ἐστίν, Ζεὺς ἔσσεται· ὦ μεγάλε Ζεῦ