well-suˈstained,ppl.a. 1742Young Nt. Th. iv. 41 Our Comment on the Comedy, Pleasing Reflections on Parts well-sustain'd, Or purpos'd Emendations.1790Burke Fr.Rev. 249 A slow but well-sustained progress.1842S. Lover Handy Andy lii, The bugler, lifting his instrument to his lips, gave one long well-sustained blast.