con·grat·u·late [ kən gráchə làyt ](past and past participlecon·grat·u·lat·ed, present participlecon·grat·u·lat·ing, 3rd person present singularcon·grat·u·lates)
verb
Definition:
1. transitive verb express pleasure at somebody's good fortune: to express pleasure or approval to somebody for an achievement or good fortune or on a special occasion
2. vr feel pleased with something: to feel self-satisfied in having success or good fortune I was congratulating myself on my driving skills, when I skidded into a snow bank.
[Mid-16th century. < Latin congratulat-, past participle of congratulari "rejoice with" < gratus "thankful"]