lacking manners or courtesy; rude or uncomfortably blunt in speech or behavior

showing no trace of politeness or courtesy; behaving in a blunt or rude manner

reduplicated form of [[客气|客氣|ke4 qi5]], describing someone being very polite, modest, or formal in their manner.

Words or language used out of courtesy, etiquette, or social convention.

please don't be formal; feel free to act informally or help oneself

Please don't stand on ceremony; an invitation to relax and not act with excessive formality.

urging someone to act naturally or feel at home without needing to observe formal etiquette