Noun
Insincere, flattering, or obsequious assent; hypocritical or pretended concurrence.
Source: Webster's dictionaryAbject flattery and indiscriminate assentation degrade, as much as indiscriminate contradiction and noisy debate disgust. But a modest assertion of one's own opinion, and a complaisant acquiescence in other people's, preserve dignity. Philip Stanhope, 4th Earl of Chesterfield