Douglas Harper's Etymology Dictionary
rebarbative
"repellent, unattractive," 1885, from French rébarbatif (14c.), from barbe "beard," from Latin barba (see barb (n.)).
Wiktionary
rebarbative
a. irritating, repellent.
WordNet
Usage examples of "rebarbative".
Maltby had dwelt - as he invariably did - on the rebarbative topic of the Canal.