Obs. Forms: 2 þrimnis, þreomnes, 2–3 þrem-, þrim-, (Orm.) þrimmnesse, 3 þrum- (ü). [Early ME. alteration of OE. þrines, þrinnes, THRINNESS. The change may have been due to association with OE. þrymm THRUM sb.1, majesty, glory, and its compounds, as þrymsetl throne, þrymsittende (cf. ‘seo þrynis þrymsittende,’ ‘the Trinity sitting in glory’); but in that case we should have expected the form with þrym to have appeared in OE.] The Trinity. Cf. THREENESS.
a. 1175. Cott. Hom., 219. Þeos þrimnis is an god.
c. 1175. Lamb. Hom., 99. He scal ileafan on þa halȝa þreomnesse and on soðre annesse. Ibid., 101. Þere halȝan þremnesse.
c. 1200. Ormin, 11177. Þatt iss an Unnseȝȝenndliȝ þrimmnesse, Faderr, & Sunc, & Haliȝ Gast.
c. 1200. Trin. Coll. Hom., 25. Þe holie þremnesse shop and biwalt alle shafte.
a. 1225. St. Marher., 11. Þrumnesse þreo fald ant anfaldte hweðere.
a. 1240. Sawles Warde, in Cott. Hom., 259. Þe hali þrumnesse, feader ant sune ant hali gast.
