v. & n.
v.tr. 1 necessitate or involve unavoidably (the work entails much effort). 2 Law bequeath (property etc.) so that it remains within a family. 3 (usu. foll. by on) bestow (a thing) inalienably.
n. Law 1 an entailed estate. 2 the succession to such an estate. entailment n.
[ ME, f. EN-(1) + AF taile TAIL(2) ]