The International Standard Bible Encyclopedia

Trow

tro: An obsolete verb meaning "to believe"; compare "trust" and the German trauen. It occurs only in Lu 17:9, the King James Version "Doth he thank that servant. ...? I trow not," as a translation of ou doko, "I believe not." The words ou doko, however, are not part of the original text, but are a later gloss to supply an answer to the question, and hence, "I trow not" is omitted by the Revised Version (British and American).

The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.