Voynich through Phonetic Irish

[rikforto]

2. Both have been spelled and/or pronounced the same historically: 

doic1, f. (gs. ~e). 1. Difficulty, impediment. ~ a chur i rud, to impede sth. ~ i gcaint, i bpósadh, an impediment in speech, to marriage. 2. Hesitation, reluctance. Gan ~, unhesitatingly. (Var: ~e f)

duga, m. (gs. ~, pl. ~í). 1. Dock (for ships). ~ grábhála, snámha, tirim, graving, floating, dry, dock. ~í, docks, dockyard. 2. (Of canal) Basin. (Var: dug m; pl. ~nna)

This is explanation looks very dubious to me. In modern Irish the pronounciation doic is /dɪc/ while duga is /dʊɡa/; I know there has been some contention here about IPA, but all that matters is that /dɪc/ and /dʊɡa/ are not the same. As a rule, homophones do not split once merged, and Irish preserves historical spellings that showed differences in pronunciation at the earlier stages of the language, so I am going to be a stickler and ask you to furnish some evidence that they were historically the same phonetically.

5 and 6 I'm not sure, I have to revisit my language arts notebook from 5th grade. lol

I would be much obliged if you did, though explaining the long strings of nouns might well clear this up implicitly.

If it helps, the following sentences should illustrate my question:

• I am drunk.
  
• I am a drunk.
  

In both the subject is "I". The predicate is everything that remains in each. So to answer question 5 I just need to know what nouns go with bi. For question 6, my understanding is that the first sentence would use is but the second would use bi; this understanding is heavily influenced by my understanding of a similar distinction in Spanish, so I would accept I am off base here. But I am given to understand that bi indicates there is something temporary rather than essential about the equivalence, and that seems odd for the nouns around it.