Definition: The ability to act or speak appropriately in social situations.
“Hit the road in wander mode, inquire along the way. Savoir-faire in full despair while living day to day, my heart is not a cauldron of proof.”
—“Prove It” on The Process of Belief
In a sentence: Derek booed that kid when he struck out at T-ball. Not exactly a paragon of savoir-faire, that Derek.
Synonyms: aplomb, tact, diplomacy, poise, grace
Antonyms: awkwardness, gaucheness, clumsiness
Etymology: French–Savoir (to know how) faire (to do)
Entomology: the branch of biology concerned with insects
source: the google