oathfuladj.

1851 H. Mayhew London Labour I. 256/1 Strong and oathful imputations.

1887 W. G. Simpson Art of Golf x. 171 An earnest oathful desire for victory.

1929 T. Wright Life William Blake i. 16 His violence of speech was proverbial. He was more oathful even than Barry.

1956 F. Swinnerton Background with Chorus xv. 154 John Masefield [sic] poetic narrative, The Everlasting Mercy,..carrying the vernacular to an oathful extreme, was the most widely read verse of the ‘new’ age.

1962 J. Berryman Spehen Crane 186 It was as a man that he valued Frederic—self-educated like himself..frank, oathful—‘God's trousers!’ he used to shout.

1996 Chicago Tribune 20 Dec. 4 An oathful, intransigent, pipe-dreaming father.