Ac is the long a sound (ah)
Anglo-Saxon Rune Poem (from ragweedforge.com)
The oak fattens the flesh of pigs for the children of men.
Often it traverses the gannet’s bath,and the ocean proves whether the oak keeps faithin honourable fashion.
Ac reversed signifies that deception, dishonor, and disingenuous dealings, usually with people. It is an unfortunate, but there are people who don’t take commitments seriously, who break contracts and agreements, and who area very irresponsible in a number of ways. Ultimately, it all falls upon that person, who failed to read the agreement he was entering into, who didn’t bother to keep track of to whom promises were made, and then when the collector comes calling, he seeks to break out of that commitment, claiming foul play and casting disrepute onto those with whom the debtor came into agreement. The commit-aphobic as it were.