It's possible that:
* It's a mispronounced or misspelled word: Could you double-check the spelling?
* It's a regional dialect: It might be a word specific to a particular Luhya sub-tribe or region.
* It's a new or emerging term: Language is constantly evolving, so it might be a new word not yet widely known.
To get a more accurate answer, please provide more context or information about where you encountered this word. For example:
* The sentence where it was used.
* The situation or conversation it was part of.
* The speaker's sub-tribe.
With more context, I might be able to help you understand the meaning of "eliaro."