ἀσυνθεσία

A. breach of covenant, transgression, LXX 2 Es. 9.2,4.
II. being uncompounded or uncombined, A.D. Pron. 32.10; opp. σύνθεσις, Phlp. in Ph. 113.11.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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