"Gelivable" means something is cool, or cooperative. And "ungelivable" means just the opposite.
"Gelivable" is a Chinese word in English alphabet, with its original form in pinyin "geili". It used to be a regional dialect meaning something is cool or supportive. "Gei" means "to give" or "to be given." "Li" means "ability" "power" or "force." So together they mean "to give force (to)" "be capable of."
For example, when you are downloading at a speed of 1TB/s, it is very "geilivable."
A geisha is a traditional Japanese entertainer of men. She is a master of traditional arts including music, serving tea (which is a fine Japanese art), dancing and singing etc. Most geisha live in Tokyo or Kyoto (those in Kyoto call themselves geiko. Although in the past it could be argued that geisha were prostitutes (which would be an egregious oversimplification...today it can be easily and accurately said that geisha are certainly not prostitutes.
Geisha have very powerful connections all over the world, hence they are a power to be reckoned with.