2 adjectives to describe ab

'To understand a complex AB,' he [Footnote 1: So far as I catch his state of mind, it is somewhat like this: 'Book,' 'table,' 'on'how does the existence of these three abstract elements result in this book being livingly on this table?

[10] Called Lenger in Forster, who gives, as synonymous, Ab-lenger and Abi- longur; which merely repeat the original name Lenger, with the prefix abi, which signifies water or river.

2 adjectives to describe  ab