1. (

• necessitate ,
• ask ,
• postulate ,
• need ,
• require ,
• take ,
• involve ,
• call_for ,
• demand

) require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent" ;

2. (

• ask ,
• require ,
• expect

) consider obligatory; request and expect; "We require our secretary to be on time"; "Aren't we asking too much of these children?"; "I expect my students to arrive in time for their lessons" ;

3. (

• command ,
• require

) make someone do something ;

4. (

• want ,
• need ,
• require

) have need of; "This piano wants the attention of a competent tuner" ;