nāvĭtas (gnāv-), ātis, f. [navus],
promptness, assiduity, zeal : istam operam tuam, navitatem, animum in rem publicam, etc., Cic. Fam. 10, 25, 1: gnavitas studiosa, Arn. 1, p. 3.
nāvitās (gnāv-) ātis, f navus, promptness, assiduity, zeal . ...
An Elementary Latin Dictionary