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Webster 1828 Edition

adv.

Unfortunately; miserably; calamitously.

unhappily ‎(comparative more unhappily, superlative most unhappily)

Unfortunately; regrettably.
- 2012, Christopher Clark, The Sleepwalkers, Penguin 2013, p. 76:
  Theodore Roosevelt […] added, perhaps unhappily, that he believed the US administration in the Philippines could learn a lot form the Austrian example.
Through evil fate or chance; wretchedly.
Without happiness; sadly.