2.
place holder for any noun; something; "whatchamacallit".
In English whatchamacallit is slang for "whatever you may call it".
3.
possessive
absolute.
When any of the clitic set 2 nonfocused pronouns follow anu , anu transforms them into absolute possessives, namely, "mine", "hers", "his", "ours", "theirs", "yours".
That religious book is mine.