Verb-past + にゃいかん

Question

最高の杖を持たにゃいかん。
You've got to have the best wand.

The meaning is clear, but I'm baffled by the grammar.

First, I'm assuming 持た is a typo for 持った, but maybe not?

Second, I'm guessing that にゃいかん is a contraction of にはいかない. But the only grammar I know involving にはいかない is わけにはいかない and that would give the opposite meaning to my translation. I cannot find verb-past + にはいかない in any reference.

I know the character talks with a heavy dialect in the original book (Hagrid from Harry Potter) but I can normally see how what he says is connected to standard grammar. This one has me stumped.

Answer 1

This is a correct sentence. The sentence is the same as 最高の杖を持たないといけない but said in stereotypical "(wise) old man speech".

• 持たにゃ is short for 持たねば (eba-to-ya contraction).
• 持たねば is a literary/classical form of 持たないと
  • ねば in 食べねば; relation between ねば and なければ
  • What verb form is くださねばなるまい
• いかん is a dialectal/old way of saying いけない
  • Use of "いかん" in the following sentences
  • Weird Inflection -されていかん