1) Administer an oath 2) Administer an oath to 3) Administer the oath to 4) Ceremoniously admit 5) Don opens wrong institute 6) Give an oath to 7) Prepare for questioning 8) Prepare for testimony 9) Prepare for the witness stand 10) Prepare to take the stand 11) Ready for testimony Found on https://www.crosswordclues.com/clue/swear-in