Sc. Obs. Also frustar, -ir, -yr. [? Back-formation from FRUSTER v. or FRUSTRATE.]
A. adj. Fruitless, ineffectual, meaningless, vain; empty of (deeds). Also absol. in fruster: in vain.
c. 1470. Henry the Minstrel, Wallace, IV. 345. In frustyr termys I will nocht tarry long.
1500–20. Dunbar, Poems, xlvi. 53. He of natur that wirker wes and king, Wald no thing frustir put. Ibid., lxv. 21. To ws … in our darkness be lampis in schyning: Or than in frustar is [all] ȝour lang leirning. Ibid. (1508), Tua Mariit Wemen, 190. He has a forme without force, And fair wordis but effect, all fruster of dedis.
B. sb. Frustration, disappointment.
c. 1470. Henry the Minstrel, Wallace, I. 313. Quhat suld I spek of frustir?
