Mark 11:29

29 And Jesus answering said to them, `I will question you -- I also -- one word; and answer me, and I will tell you by what authority I do these things;

Mark 11:29 Meaning and Commentary

Mark 11:29

And Jesus answered and said unto them
Being not in the least intimidated by such a body of men:

I will also ask of you one question;
or "one word", or "one thing"; (logov) , here answers to the Hebrew word (rbd) , which signifies both "word" and "thing":

and answer me, and I will tell you by what authority I do these
things; (See Gill on Matthew 21:24).

Mark 11:29 In-Context

27 And they come again to Jerusalem, and in the temple, as he is walking, there come unto him the chief priests, and the scribes, and the elders,
28 and they say to him, `By what authority dost thou these things? and who gave thee this authority that these things thou mayest do?'
29 And Jesus answering said to them, `I will question you -- I also -- one word; and answer me, and I will tell you by what authority I do these things;
30 the baptism of John -- from heaven was it? or from men? answer me.'
31 And they were reasoning with themselves, saying, `If we may say, From heaven, he will say, Wherefore, then, did ye not believe him?
Young's Literal Translation is in the public domain.