zaiva = difficult (adjective) (some things Google found for "zaiva": an uncommon term; an unusual feminine first name; user names; name of a World of Warcraft character; zaiva (or śaiva) means relating or belonging or sacred to the god Shiva (or Siva) in Sanskrit)
Word derivation for "difficult" (hard):
Basque = zail, Finnish = vaikea
Miresua = zaiva
I seem to be using the letter V often lately.