evergreen bittersweet everg·reen·bit·tersweet uncommon noun 1. broad and bushy Asiatic twining shrub with pinkish fruit; many subspecies or varieties Synonymsevergreen bittersweetEuonymus fortunei radicansEuonymus radicans vegetus Related words Broader terms vine Parts Euonymus WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.