perjure
/ˈpɜrʒaɪ/; /ˈpɜrˌdʒʊər/Definitions
1. verb
to give false testimony under oath, especially in a court of law
“The witness was accused of perjuring himself on the stand.”
2. noun
the act of giving false testimony under oath
“The jury found the defendant guilty of perjury and perjury.”