(hardier, hardiest)
1.
Plants that are ~ are able to survive cold weather.
The silver-leaved varieties of cyclamen are not quite as ~.
ADJ
hardiness
...the hardiness of other species that have blue flowers.
N-UNCOUNT
2.
People and animals that are ~ are strong and able to cope with difficult conditions.
It should not surprise us that such an environment has produced a ~ and independent people...
ADJ
hardiness
...the hardiness, endurance, and courage of my companions...
N-UNCOUNT
3.
If you describe a group of people as ~, you mean that they have been very patient or loyal, or have been trying hard to do something in difficult conditions.
...the ten ~ supporters who had made the trek to Dublin from Riga.
ADJ: usu ADJ n