Oh DEITY! This is another skeleton in my closet. The word seems odd, it does not actually violate the phonetic rules, it seems not to be onomatopoetic at all, but it is in the IRD* and the rules of consistency mean that it is to remain. What I could do is give the word for ‘in the flow’ a different word, which is ‘letena and create a different word as synonym.
kihjune’het: flowing water
Example: Ykija’het mi’aru hilid’het asu kihjune’tan asu. (Hole 3S-be tree near river near: Near a tree by a river there’s a hole in the ground) listen
*incomplete rejistanian dictionary