required

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. necessary for relief or supply (Freq. 13)
- provided them with all things needful
• Syn:
needed, needful, requisite
• Similar to:
necessary
• Derivationally related forms:
requisite (for: requisite), requisiteness (for: requisite)
2. required by rule (Freq. 1)
- in most schools physical education is compulsory
- attendance is mandatory
- required reading
• Syn:
compulsory, mandatory
• Similar to:
obligatory
• Derivationally related forms:
mandate (for: mandatory)

• Từ đồng nghĩa / Synonyms:
  want, need, command, ask, expect, necessitate, postulate, take, involve, call for, demand
• Từ trái nghĩa / Antonyms:
  obviate, rid of, eliminate