The two crossword solutions for the term 'testifies under oath' are 'depones' and 'DEPOSES'. Both words have the same meaning, which is to give evidence or testimony in a court of law. Depones is derived from the Latin verb deponere, which means to testify, while DEPOSES is derived from the French verb deposer, which also means to testify. Both words refer to the act of giving sworn testimony in a legal proceeding.