Relentless
Continuous, Incessant, Untiring (Adjective).
Colossal
Huge, Gigantic. Derived from the huge statue of Colossus of Rhodes, one of the wonders of the ancient world (Noun).
Momentous
Important, Significant, Crucial (Adjective).
Commandeer
Seize, Take, Expropriate (Verb).
Introspective
Inward-looking, Self-examining (Adjective).
Conscientious
Diligent, Industrious, Hardworking (Adjective).
Slackening
Loosening, Decelerating (Adjective).
Metamorphosis
Change, Transformation (Noun).
Fin de siècle
End of century, from French (Adjective).
Temporise
Delay, Equivocate, Procrastinate (Verb).
Implacable
Unforgiving, Unappeasable (Adjective).
Coalesced
Joined, Combined, Merged (Adjective).
Clamber
Climb, Scrabble, Scramble (Verb).
Imprecation
Curse, Malediction (Noun).
Confiscated
Seized, Taken over, Appropriated (Adjective).
Phantasmagoria
Aberration, Apparition, Illusion (Noun).
Succintly
Briefly, Tersely, Concisely (Adverb).
Ruefully
Apologetically, Penitently, Regretfully (Adverb).
Luminous
Shining, Dazzling, Radiant (Adjective). C.f. Virginia Woolf: “Life is not a series of gig lamps symmetrically arranged; life is a luminous halo, a semi-transparent envelope surrounding us from the beginning of consciousness to the end.”
