traicionar
/tɾaiθjoˈnaɾ/ · A2 · verb
to betray, turn on
🗡️ traicionar = traición (treason) + -ar: to commit treason against someone
From Latin tradere, to hand over, the same root as English traitor and treason. A traitor hands you over to the enemy; a slip of the tongue hands over your secret. Both senses of traicionar are a handing over.