CONCILIATE
accommodate, reconcile, conciliate
(verb) make (one thing) compatible with (another); “The scientists had to accommodate the new results with the existing theories”
reconcile, patch up, make up, conciliate, settle
(verb) come to terms; “After some discussion we finally made up”
pacify, lenify, conciliate, assuage, appease, mollify, placate, gentle, gruntle
(verb) cause to be more favorably inclined; gain the good will of; “She managed to mollify the angry customer”
Source: WordNet® 3.1
Etymology
Verb
conciliate (third-person singular simple present conciliates, present participle conciliating, simple past and past participle conciliated)
(transitive) To make calm and content, or regain the goodwill of; to placate.
(intransitive) To mediate in a dispute.
Source: Wiktionary
Con*cil"i*ate, v. t. [imp. & p. p. Conciliated; p. pr & vb. n.
Conciliating.] Etym: [L. conciliatus, p. p. of conciliare to draw or
bring together, unite, from concilium council. See Council.]
Definition: To win ower; to gain from a state of hostility; to gain the
good will or favor of; to make friendly; to mollify; to propitiate;
to appease.
The rapacity of his father's administration had excited such
universal discontent, that it was found expedient to conciliate the
nation. Hallam.
Syn.
– To reconcile; propitiate; appease; pacify.
Source: Webster’s Unabridged Dictionary 1913 Edition