DIPHTHONGAL
Diph*thon"gal, a.
Defn: Relating or belonging to a diphthong; having the nature of a
diphthong.
— Diph*thon"gal*ly, adv.
DIPHTHONGALIZE
Diph*thon"gal*ize, v. t.
Defn: To make into a diphthong; to pronounce as a diphthong.
DIPHTHONGATION
Diph`thon*ga"tion, n.
Defn: See Diphthongization.
DIPHTHONGIC
Diph*thong"ic, a.
Defn: Of the nature of diphthong; diphthongal. H. Sweet.
DIPHTHONGIZATION
Diph`thong*i*za"tion, n.
Defn: The act of changing into a diphthong. H. Sweet.