con·grat·u·late (kən-grāch'ə-lāt', -grāj'-, kəng-) tr.v.
con·grat·u·lat·ed, con·grat·u·lat·ing, con·grat·u·lates To express joy or acknowledgment, as for the achievement or good fortune of (another).
[Latin congrātulārī, congrātulāt- : com-, com- + grātulārī, to rejoice (from grātus, pleasing; see gwerə-2 in Indo-European roots).] con·grat'u·la'tor n., con·grat'u·la·to'ry (-lə-tôr'ē, -tōr'ē) adj.