Present participle of conciliate; the act of bringing opposing parties together; also used as an adjective meaning 'tending to bring peace.'
Regular present participle formation from conciliate using -ing. Can function as verb (showing ongoing action) or adjective (describing a peaceful, reconciliatory quality).
A 'conciliating tone' is the opposite of aggressive—it's the voice someone uses when they want to heal a rift. Notice how the same suffix -ing on a verb automatically makes it work as an adjective describing personality or approach.
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