compulsory

词形变化：

副词: compulsorily | 名词: compulsoriness | 名词复数: compulsories |

同义词：

required | necessary | compelled | forced | imperative | forcible | obligatory | enforced | essential | unavoidable | mandatory |

反义词：

elective | convex | optional | voluntary |

词义辨析：

同义:

a.强制的; 义务的

compelled

required

necessary

同义参见:

imperative

forced

forcible

反义:

a.强迫的; 选修的

voluntary

elective

optional

反义参见:

liberal

spontaneous