七老八十

1. • in one's seventies (age)
2. • very old (of people)

Character by character

• 七(qī)seven
• 老(lǎo)prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
• 八(bā)eight
• 十(shí)ten