decir
/deˈθiɾ/ · A1 · verb
to say, to tell, to name, to mention
💬 From Latin dicere, to say — same root as dictate, diction, dictionary
Decir comes from Latin dicere, the source of English dictate, predict (say before) and contradict (say against). Swap the Latin dic- for dec- and you have the Spanish verb. Its past participle dicho also means a saying.