Words I wish I Knew ... #whenEnglishfails

Found this on BBC and it's just brilliant. Words from other languages that are so apt, so descriptive of situations I've faced and remembered. Often wished that I had words to describe the circumstance - now I do.

Now I need a word for "forgetting difficult words that you wish you remembered".

 Swedish - very specifically descriptive in just a single word !

Hawaiian - I bet this happens to loads of people 

Japanese - what's the English equivalent ?

Stoned ? Zoned out ? Daydreaming ? 

Welsh - Yeah, I feel this. 

More back when I was younger. 

Now I just don't have the time.

I have this down pat. I'll get around to reading them eventually.

Or at least most of them.