[goodnesswins]

I hated gerunds! In fact, so much so, that I've forgotten what the heck they are. (Adverbs in disguise?)

[Sloth]

If I recall correctly, gerunds are verb-like words ending in '-ing' that are being employed as nouns, e.g., "the questioning of the witness."

[SAJ]

A gerund is a participial form of a verb used as a noun. The most common gerund is the use of the present participle (-ing), as in 'Jogging is a bore.', but any participle might be employed as a gerund, in conformance with other grammatical considerations.