Where does “gratuli” come from?
gratuli (Esperanto) comes from German gratulieren, from Latin grātulor, from Latin grātus, from Proto-Italic grātos, from Proto-Indo-European gʷr̥Htós, from Proto-Indo-European gʷerH- — to express approval; praise; to elevate.
gratuli (Esperanto): to congratulate
Ancestry of “gratuli”, step by step