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Webster 1828 Edition

, adv.

Mournfully; with expressions or tokens of sorrow.

So as to cause sorrow.

Pitifully; despicably.

lamentably ‎(comparative more lamentably, superlative most lamentably)

Regrettably. In a manner deserving or inspiring lamentation.
Lamentably the good too die; we will all mourn his passing.

regrettably — see regrettably