bonhomie
A friendly, good-natured, pleasant manner; an affable and approachable disposition; friendliness.
uncountable
His ungainly person and awkward manners were against him with men accustomed to the graces of society, and he was not sufficiently at home to give play to his humor and to that bonhomie which won the hearts of all who knew him.
An atmosphere of friendliness and good cheer.
uncountable
A cheerful remark.
countable
Where it comes from
Borrowed from French bonhomie, bonhommie (“good-heartedness; extreme credulity”), from bonhomme (“chap, fellow; courageous man; peasant; unwise man who allows himself to be deceived and dominated”) (from bon (“good”) + homme (“man”)) + -ie (suffix forming feminine, usually abstract, nouns).
Adapted from the Wiktionary entry bonhomie (CC BY-SA 4.0).