The word "旖旎" is formed as a disyllabic compound where each character is a phonosemantic construct: "旖" combines the radical "方" with the phonetic component "奇", while "旎" combines the radical "方" with the phonetic component "尼". Together, they operate as a single linguistic unit in which the characters are chosen primarily for their phonetic contributions, creating a bimorphemic word with the combined meaning of "charming" or "gentle".