Heighten (hit'n), v. t. [Written also highten.] [imp. & p. p. Heightened; p. pr. & vb. n. Heightening.]
1. To make high; to raise higher; to elevate.
2. To carry forward; to advance; to increase; to augment; to aggravate; to intensify; to render more conspicuous; -- used of things, good or bad; as, to heighten beauty; to heighten a flavor or a tint. "To heighten our confusion." Addison. An aspect of mystery which was easily heightened to the miraculous. Hawthorne.
Shades of meaning
Fernald lists heighten only as an antonym, under alleviate.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given