esemplastic
Unifying; having the power to shape disparate things into a unified whole.
1893: all the verses when taken together … are deficient in harmony, and consequently there is little or no fusion. The esemplastic power of the writer's feeling was not strong enough, did not extend beyond the individual verse. — Hiram Corson, A Primer of English Verse (pp. 21–22)
Where it comes from
From Greek ἐς ‘into’ + ἕν + πλαστικός (from πλάσσειν ‘to mould’). Coined by Coleridge, probably after German ineinsbildung ‘forming into one’.
Adapted from the Wiktionary entry esemplastic (CC BY-SA 4.0).