regretful

From regret +‎ -ful.

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regretful (comparative more regretful, superlative most regretful)

1. Full of feelings of regret, indulging in regrets.
2. Sorrowful about what has been lost or done.

• (full of regret): repining, rueful, sorrowful

• regretfully
• regretfulness
• unregretful

• “regretful”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “regretful”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.