...................
So in summary the ing/ungs are masculine, and strong? I'm a little confused because my grammar book (Old English Grammar, Joseph Wright) says in para. 615:
"-ung, more rarely -ing, ... used in forming fem. abstract nouns, especially from the second class of weak verbs..."
The -ung/-ing suffix is mostly feminine. The only masculine examples that I can find in Bosworth & Toller are:-
an-bídung es; m. An abiding, tarrying, awaiting, expectation.
and-bídung es; m. Expectation.
andetting es; m. A confession, profession; confessio, professio. v. andettan.
delfing es; m. A DELVING, digging, laying bare, exposing
ge-rǽding es; m. A decree
These appear to be such a random selection that I wonder whether even these were truly masculine - for example - although ge-rǽding is masculine, rǽding is feminine and vice versa with the masculine an-bídung (an abiding, tarrying, awaiting, expectation) and and-bídung (expectation) with a feminine ge-anbidung (expectation).