What's the meaning of 遺る and 強くなんない in the context of drinking?

Question

I asked a question here recently regarding the same material and thanks for that. I have a different question this time though.

For context, 3 people (Uncle and Nephew + Nephew's friend) are drinking beer at home. After some time, they stop drinking. The son goes to sleep due to being drunk. The father then cleans the dishes, and the friend cleans up the table. This was the dialogue that followed:

Father: 毎週飲んで遺れてるのにちょっとも強くなんないの

Friend: テコでも起きませんもんね

Does the 遺れてる here refer to the son passing out? or something else being left behind (like beer or something)?

I assumed that "ちょっとも強くなんないの" translated to "When is he going to be come a little strong (against beer). Is that right?

Thanks to anyone who takes the time, in advance.

Answer 1

潰れる literally means "crumble", and here it more or less denotes the process of "getting dead drunk". According to デジタル大辞泉, it's described as

７ 酒に酔って動けなくなる。「―・れるまで飲む」

"To get so drunk as to become unable to move."

In this context, 強さ refers to resistance towards alcohol intoxication, also known as alcohol tolerance. A person who can drink very much without showing signs of intoxication is said to be「お酒に強い」. This resistance tends to increase the more a person drinks (due to increased expression of enzymes that metabolize ethanol in the liver), and thus the father here laments (or pokes fun at) the fact that this does not seem to occur in his son's case.

The actual sentence could be translated like

"I don't get it; he gets drunk on a weekly basis, and yet he still hasn't developed any tolerance."

or maybe like

"Every week he drinks until he passes out, and yet he never gains any tolerance..."