足足【zúzú】

足足 stresses that an amount is big – bigger than expected, or bigger than it should be. It needs a number to work on, and goes either before the verb or straight before the number.

With 有

For a size, weight or distance, 足足 + 有 + number gives "a good…, all of…". The adjective can follow the measure.

足足 or 整整

整整 also means "a whole", and stresses that the amount is complete – no more, no less. 足足 stresses that it is large and often carries surprise or complaint.

Small or missing amounts

足足 only fits an amount the speaker finds big. It cannot go with 只, 才 or 不到, and it cannot stand before an adjective without a number.

• × 只足足等了五分钟 → 只等了五分钟
• × 足足不到十个人 → 不到十个人
• × 这个箱子足足重 → 这个箱子足足有二十公斤重