/'ta:di:n3s/ means being late or not arriving on time. sự chậm trễ
tard: late (French)
His tardiness caused him to miss the beginning of the meeting.
The teacher warned the students about repeated tardiness to class.
You missed 15 minutes of the movie due to your tardiness.
the situation is improving or getting better. This expression is often used in British English is synonymous with "on the up and up" = improving all the time.
After a difficult year, things are on the up.
After a rough start, her business is finally on the up.
Her career has been on the up and up since she moved into sales.
move backward in fear or dislike
The dog barked loudly, so she backed away.