[f. as prec. + -NESS.] The quality of being traitorous; treachery.
1571. Golding, Calvin on Ps. xxix. 2. 106. To abuse their highnesse too trayterousnesse.
1592. Wyrley, Armorie, 136. Which citie yeelded was byth tretrousnes Of their Bishop.
1623. Wither, Brit. Rememb., VII. 2221. It is a kind of trait’rousnesse To give them more then due, as well as lesse.
1727. Bailey, vol. II., Traitorousness, Treasonableness, Perfidiousness.
1878. Simpson, Sch. Shaks., I. 130. One of the arguments … was the traitorousness of the attempt.
