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Adverb: regretfully  ri'gret-fu-lee
  1. With regret (used in polite formulas)
    "I must regretfully decline your kind invitation"

See also: regretful

Nearest

regression analysis
regression coefficient
regression curve
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