The Oxford Thesaurus An A-Z Dictionary of Synonyms - sadly adv.

1) unfortunately, alas, unhappily, unluckily, lamentably, regrettably, deplorably, sad to relate: Sadly, all our oldest oaks were uprooted in the hurricane. 2) unhappily, gloomily, morosely, mournfully, despondently, miserably, wretchedly, dejectedly, dismally, sombrely, lugubriously: He told me sadly that he did not expect to return to England again.