Hi Ah-bin,
Thanks for the explanation. Indeed, I even seem to recall this discussion here many, many years ago (I think before you joined the Forum).
I may have said it then, but I'll say it here again.
I have a distinct recollection that when I was young, in Malaysia, I was corrected in my usage by my parents. They explained exactly what you said: "kah4" means "to order someone to", whereas "ka3" means "to teach". At the time, this didn't make much sense to me, and I sort of didn't quite believe them, because this is not what I heard my contempories saying. Among us kids, we didn't use "kah4" to mean "to order someone to". It was just one of those concepts which we didn't have a word for. And we used "kah4" to mean "to teach".
Years later (i.e. long after I was an adult, and some time after I was a member of this Forum), I asked my parents about this distinction again (prompted probably by a discussion on this topic on the Forum). I tried to remind them of the time they had explained the distinction to me, when I was a child. But,
they denied all knowledge of this, saying that they'd never heard of this distinction, didn't make it themselves, and so couldn't possibly have explained such a distinction to me
.
I attribute this to the fact that they left Malaysia 40 years ago, and what little Hokkien they speak they have mostly spoken to one another all these years. Because I really do remember the discussion in Malaysia, and I can't imagine that I could have imagined or invented this distinction all by myself.
So, the best I can do is ask some uncles and aunts, the next time I speak to them. I shall undertake to do this, and post their answers here in the future.
BTW, I checked with my Dad about the superstition about not walking under women's underwear when it's hung out to dry, and he confirmed this exactly as you described it. It has to be women's underwear (there is no superstition about men's underwear, and no superstition any other sort of women's clothing), and it has to be when it's hung out to dry.
They also confirmed "lo5" for "dozen", but I gather that you were sufficiently confident of that already, and didn't need confirmation.