: to express pleasure on account of success or good fortune <I congratulated the winner.>
Word Root of CONGRATULATE
The Latin word gratus, meaning “pleasing” or “thankful,” gives us the root grat. Words from the Latin gratus have something to do with being pleasing or being thankful. To ingratiate yourself is to make others feel thankful for something you've done. To feel grateful is to feel thankful for something. Gratitude is a feeling of thankfulness. To congratulate is to express how pleasing someone's success is.