I just got this question from krilltish on the livejournal Cniglic community:
Also, if [-nai] means negaing, opposite (equivalent to Esperanto [mal-]), would [.uinainai] still mean "happy" or just mean "the opposite of unhappy"?
pe'u. ko .io spudaI can explain a little in general about Lojban negation & the roles of zo nai, but I don't know what happens if you put two nais after .ui like that?!
mu'o mi'e doi bret.