Dichotomy
Duality, contrast
Fiduciary
Trustee. responsible
Dessicate
Dry
Diaphanous
Transparent, delicate
Moribund
Lacking vitality, dull, stagnant
Quandary
Predicament
Diurnal
Daily
Gregarious
Friendly
Ephemeral
Lasting short, transient
Facile
Good only on surface, superficial
Fulsome
Flattering, plentiful
Languish
Suffer, make weak; deteriorate
Pallor
Paleness
Perfidy
Deceitfulness; untrustworthiness
Effigy
Likeness, model
Gratuitous
Uncalled for
Desultory
Aimless
Immutable
Unchanging
Anathema
Curse
Obdurate
Stubborn
Progenitor
Precursor, founder
Subterfuge
Trickery, deceit
Ingratiate
Curry favor, bring into favor
Epithet
Label, name