as in, "Doing meth is FUcking unlucky, and really FUcking unwise. "
below (下) + one stroke. You can think of 不運 (unlucky) or 不平等 (unfair) as being below or less than lucky or fair.
a mystery or unexplainable thing. BOOBOO:NOT a mystery like Sherlock Holmes or "Colonel Mustard, in the drawing room, with the double-headed dildo." A mystery like how fat Americans are, or why Sting is famous. That's a fushigi.
To not have enough of a physical thing (money, time, nurses, teachers.) Also implies that there is a specific amount that is required, For example -犬不足 (a dog shortage). There's no particle or verb needed.
an affair - cheating