Sentence:  So there will be three massless (or nearly massless, if there is some breaking of the new "O"(4) symmetry) "dark" Nambu-Goldstone bosons I call "k", as well as a new massive <WSD>Higgs-like</WSD> boson called "S". 
Meaning of the word marked with <WSD> tags:  (of a particle) Similar in mass and other properties to the proposed Standard Model Higgs boson.