v. Obs. exc. dial. [dim. or freq. of THWART v.: see -LE 3.] intr. To speak or act in contradiction.
1647. Trapp, Comm. Rom. ii. 8. That wrangle and thwartle against clearest truths.
1847–78. Halliwell, Thurtle, to cross in discourse; to contradict. Somerset. Whartle, to cross; to tease. Norf.
