Early 19th century; earliest use found in Maria Edgeworth (1768–1849), novelist and educationist. From French malheureusement from malheureux + -ment, suffix forming adverbs.
Definition of malheureusement in US English:
malheureusement
adverbˌmaləːˈrəːzmɒ̃
humorous
Unfortunately.
Origin
Early 19th century; earliest use found in Maria Edgeworth (1768–1849), novelist and educationist. From French malheureusement from malheureux + -ment, suffix forming adverbs.