Luke 21:15

15 because I will give you such words and wisdom that none of your enemies will be able to refute or contradict what you say.

Luke 21:15 Meaning and Commentary

Luke 21:15

For I will give you a mouth
A faculty of speaking, a freedom of expression, a door of utterance, a good degree of elocution, to speak properly, pertinently and freely to any point: and wisdom;
to answer with great propriety, and in the most prudent manner, to any difficult and ensnaring question; and to furnish with such knowledge of the Gospel, and with such gifts and abilities to preach and defend it, that they should be able to give a clear and distinct account of it, and prove every point in it, by the most strong and convincing arguments, and vindicate it against all objections: which all your adversaries shall not be able to gainsay or resist.
This was remarkably fulfilled in Peter, and John, and in Stephen, ( Acts 4:13 Acts 4:14 ) ( 6:10 ) . The first word, "gainsay", is left out in the Syriac and Persic versions.

Luke 21:15 In-Context

13 This will be your chance to tell the Good News.
14 Make up your minds ahead of time not to worry about how you will defend yourselves,
15 because I will give you such words and wisdom that none of your enemies will be able to refute or contradict what you say.
16 You will be handed over by your parents, your brothers, your relatives, and your friends; and some of you will be put to death.
17 Everyone will hate you because of me.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.