congratulate

Concise Oxford English Dictionary © 2008 Oxford University Press:
congratulate/kənˈɡratʃuleɪt/

▶verb express pleasure at the happiness or good fortune of.

■ praise for an achievement.

■ (congratulate oneself) feel pride or satisfaction.

– derivatives
congratulator noun,
congratulatory adjective.

– origin C16 (earlier (ME) as congratulation): from L. congratulat-, congratulari ‘congratulate’, from con- ‘with’ + gratulari ‘show joy’ (from gratus ‘pleasing’).