The no-apostrophe rule has been reaffirmed five times, yet punctuationists fight on.
It was reaffirmed in 2012, and popular support has been steadily building an ever—healthier majority for marriage equality.
He in fact just reaffirmed his support for the Defense of Marriage Act.
c.1300, from Old French afermier (Modern French affirmer) "affirm, confirm; strengthen, consolidate," from Latin affirmare "to make steady, strengthen," figuratively "confirm, corroborate," from ad- "to" (see ad-) + firmare "strengthen, make firm," from firmus "strong" (see firm (adj.)). Spelling refashioned 16c. in French and English on Latin model. Related: Affirmed; affirming.