The Collaborative International Dictionary of English v.0.48:

Regret \Re*gret"\, v. t. [imp. & p. p. Regretted (-t[e^]d); p.
   pr. & vb. n. Regretting.] [F. regretter, OF. regreter; L.
   pref. re- re- + a word of Teutonic origin; cf. Goth.
   gr[=e]tan to weep, Icel. gr[=a]ta. See Greet to lament.]
   To experience regret on account of; to lose or miss with a
   sense of regret; to feel sorrow or dissatisfaction on account
   of (the happening or the loss of something); as, to regret an
   error; to regret lost opportunities or friends.
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         Calmly he looked on either life, and here
         Saw nothing to regret, or there to fear. --Pope.
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         In a few hours they [the Israelites] began to regret
         their slavery, and to murmur against their leader.
                                                  --Macaulay.
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         Recruits who regretted the plow from which they had
         been violently taken.                    --Macaulay.
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