All 4 Uses

assent
in
Pride and Prejudice
(Edited)

To this speech Bingley made no answer; but his sisters gave it their hearty assent, and indulged their mirth for some time at the expense of their dear friend's vulgar relations.
p. 37.2

assent = agreement
Mr. Collins readily assented, and a book was produced; but, on beholding it (for everything announced it to be from a circulating library), he started back, and begging pardon, protested that he never read novels.
p. 67.4

assented = consented or agreed
In pompous nothings on his side, and civil assents on that of his cousins, their time passed till they entered Meryton.
p. 70.9 *

assents = agreements
Elizabeth looked at Darcy to see how cordially he assented to his cousin's praise; but neither at that moment nor at any other could she discern any symptom of love; and from the whole of his behaviour to Miss de Bourgh she derived this comfort for Miss Bingley, that he might have been just as likely to marry her, had she been his relation.
p. 172.3

assented = consented or agreed

Definitions:

(1) (assent)
to express agreement -- especially with a statement or proposal to do something
(2) (meaning too rare to warrant focus)