What is the antonym of "abjure"?

1. Affirm
2. Cajole
3. Insist
4. Pronounce
5. Shout

What's your opinion?

Solution 1:

If you look up abjure in a dictionary, you will find:

formally reject or disavow a formerly held belief

The two most likely antonyms are insist and affirm. But affirm's is closer:

confirm: establish or strengthen as with new evidence or facts

Solution 2:

The opposite of abjure is objure. Per the OED:

Etymology: classical Latin obiūrāre to bind by an oath < ob- prefix + iūrāre to swear (see jurant adj. and n.). Compare Middle French objurer (1460 as oubjurer).

1. trans. To bind by or charge under oath; to urge.
   

   • 1609 R. Cawdrey Table Alph., ― Obiure, binde by oath.
   • 1993 Irish Times (Nexis) 9 Feb. 17 — We are objured, in our so-called freedom of monetary exchange, to be patriotic.

2. intr. To utter an oath, to curse. Obs.

   • 1830 Fraser’s Mag. II. 178 ― As the people only laughed at him, he cried the··more vehemently; nay, at last, began objuring, foaming, imprecating.

It is not particularly common.