How to say this fact is all but unknown to them. in Japanese
1)
このこの(kono) (n) this事実事実(jijitsu) (n-adv,n) fact/truth/realityはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh彼ら彼ら(karera) (n,adj-no) those/theyにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.ほとんどほとんど(hotondo) (n-adv,n-t) mostly/nearly/practically/well-nigh/almost invariably/all but/just about/almost知らno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbれてno dictionary result, likely a conjigated verbい(prt) strengthens a question, assertion, etc.ないない(nai) (aux-adj) not/emphatic suffix。。(。) Japanese period "."
