Weariness, n.
The quality or state of being weary or tried; lassitude; exhaustion of strength; fatigue. With weariness and wine oppressed. Dryden. A man would die, though he were neither valiant nor miserable, only upon a weariness to do the same thing so oft over and over. Bacon.
Shades of meaning
Fernald lists weariness only as an antonym, under entertainment.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given