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Adverb: regrettably  ri'gretublee
  1. By bad luck
    - unfortunately, unluckily, alas

See also: regrettable

Nearest

regression equation
regression line
regression of y on x
regression toward the mean
regressive
regret
regretful
regretfully
regrets
regrettable
regrettably
regroup
regrow
regrowth
regular
regular army
regular convex polyhedron
regular convex solid
regular dodecahedron
regular expression
regular hexagon