salutary
/ˈsæljʊtərɪ/adjective
1- (especially with reference to something unwelcome or unpleasant) producing good effects; beneficial（尤指不受欢迎的或使人不愉快的事）有益的, 有利的：
it failed to draw salutary lessons from Britain's loss of its colonies.
它没能从英国丧失殖民地这件事中吸取有益的教训。
1.1
- archaic health-giving〈古〉有益健康的：
the salutary Atlantic air.
有益健康的大西洋空气。
词源
late Middle English （as a noun in the sense 'remedy'）： from French salutaire or Latin salutaris, from salus, salut- 'health'.