About the peeing at night, a doctor I saw in TV said that if during the day you don’t go immediately to pee when you feel the need but when you REALLY need to, then it’s easier to stay sleeping at night. He explained how there are 2 mechanisms to control pee: the bladder (I think that’s the word in English?) and the brain. And that quite often we train the brain to go to pee before it’s phisically needed.
‘Tenebroso’ is commonly used in Spanish, at least in Spain. This whole thread is very interesting.