The Welsh have holi (v.) examine, inquire (enquire), ask, question, interrogate, quiz, query, (ask) Holi can be used to ask a question; it is to do with enquiry ("ymholiad", an enquiry, a seeking after information). "Holi" has to mean asking after information. (examine) Holi is to ask for information, to examine a person for his answers.
And if you look at some Cornish words you can see the same root verb. Gorholeth - requisition, bidding, asking, demand, request. and Gorholy - to require, ask (I would think that gorholy is to ask strongly! Perhaps even Demand). Both from Nance's dictionary. Both these words and the Welsh suggest a common root verb. Perhaps Holi Using this verb a possible construction for inquire would be ynholi ?