testify
verb /ˈtestɪfaɪ/
  /ˈtestɪfaɪ/
Verb Forms
 Phrasal Verbs| present simple I / you / we / they testify |  /ˈtestɪfaɪ/  /ˈtestɪfaɪ/ | 
| he / she / it testifies |  /ˈtestɪfaɪz/  /ˈtestɪfaɪz/ | 
| past simple testified |  /ˈtestɪfaɪd/  /ˈtestɪfaɪd/ | 
| past participle testified |  /ˈtestɪfaɪd/  /ˈtestɪfaɪd/ | 
| -ing form testifying |  /ˈtestɪfaɪɪŋ/  /ˈtestɪfaɪɪŋ/ | 
- [intransitive, transitive] to make a statement that something happened or that something is true, especially as a witness in court- testify against somebody/something She refused to testify against her husband.
- testify for somebody/something There are several witnesses who will testify for the defence.
- testify about something He was summoned to testify before a grand jury about his role in the affair.
- testify to something/to doing something Evans testified to receiving $200 000 in bribes.
- testify (that)… He testified (that) he was at the theatre at the time of the murder.
- + speech ‘I was approached by a man I did not recognize,’ she testified.
 Extra ExamplesTopics Law and justicec1- a Mafia member who was prepared to testify for the authorities
- Several witnesses have come forward to testify against her.
- She was unwilling to testify before Congress.
- The president's former aides were called to testify at his trial.
- The basis for the perjury conviction was he had testified falsely under oath.
- A senior officer testified to the existence of police hit squads.
 Oxford Collocations Dictionaryadverb- falsely
- truthfully
- publicly
- …
 - ask somebody to
- call somebody to
- call upon somebody to
- …
 - against
- before
- for
- …
 - testify in court
- testify under oath
 
- [transitive] testify (that)… (formal) to say that you believe something is true because you have evidence of it- Too many young people are unable to write or spell well, as employers will testify.
 
- [intransitive] (especially North American English) to express your belief in God publicly
Word Originlate Middle English: from Latin testificari, from testis ‘a witness’.