Complex sentence: The religious legal terms "anús/anusáh/anusim" were applied to those Jews who were forced to abandon Judaism against their will, and yet had children who continued to do whatever was in their power to continue practicing Judaism under the forced conditions.
Split into simpler sentences: The religious legal terms "anús/anusáh/anusim" is applied to those Jews who were forced to abandon Judaism against their will. In all cases, the categorization as Ansuim is conditional on their continuing to do whatever was/is in their power to continue practicing Judaism under the forced conditions.