1.
a rate (usually rapid) at which something happens
2.
the quality of being fixed in place as by some firm attachment
3.
a strongly fortified defensive structure
The following are synonyms for 'fastness'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.
Armadillos breed in July, but get pregnant in November after delaying implantation. This allows the young to be born during the spring when there is an abundance of food.