necessitate
verb /nəˈsesɪteɪt/
  /nəˈsesɪteɪt/
(formal)Verb Forms
| present simple I / you / we / they necessitate |  /nəˈsesɪteɪt/  /nəˈsesɪteɪt/ | 
| he / she / it necessitates |  /nəˈsesɪteɪts/  /nəˈsesɪteɪts/ | 
| past simple necessitated |  /nəˈsesɪteɪtɪd/  /nəˈsesɪteɪtɪd/ | 
| past participle necessitated |  /nəˈsesɪteɪtɪd/  /nəˈsesɪteɪtɪd/ | 
| -ing form necessitating |  /nəˈsesɪteɪtɪŋ/  /nəˈsesɪteɪtɪŋ/ | 
- to make something necessary- necessitate something Recent financial scandals have necessitated changes in parliamentary procedures.
- necessitate doing something Increased traffic necessitated widening the road.
- necessitate somebody/something doing something His new job necessitated him/his getting up at six.
 Oxford Collocations DictionaryNecessitate is used with these nouns as the object:- removal
 Word Originearly 17th cent.: from medieval Latin necessitat- ‘compelled’, from the verb necessitare, based on Latin necesse ‘be needful’.