■ verb express pleasure at the happiness or good fortune of.
↘praise for an achievement.
↘( ~ oneself ) feel pride or satisfaction.
Derivatives
congratulator noun
congratulatory adjective
Origin
C16 (earlier (ME) as congratulation ): from L. congratulat- , congratulari '~', from con- 'with' + gratulari 'show joy' (from gratus 'pleasing').