a. rare. [f. THREAT sb. + -FUL.] Full of threats; threatening.
c. 1557. Abp. Parker, Ps., E iij. The thretfull warninges of the judgement.
1611. Speed, Hist. Gt. Brit., IX. viii. (1623), 582. By their threatfull letters.
176072. H. Brooke, Fool of Qual. (1809), IV. 129. A threatful and agile whirl of his staff.
1882. Farrar, Early Chr., II. 6. Not the threatful Law of Moses, but the royal Law, the perfect Law of liberty.
Hence Threatfully adv., threateningly.
1565. Stapleton, trans. Bedes Hist. Ch. Eng., 50. S. Austen thretfully proficied, that, if they would not take peace with their brethern, they should receaue warre from their enemies.
1634. Sir T. Herbert, Trav., 190. [A] flaming Semiter (threatfully held against him).
1822. Hood, Lycus, vi. The spirits of sin that threatfully warrd with the light.