The Spanish verb 'confabular' (meaning 'to conspire or plot together') comes from the Latin verb 'confabulari', which meant 'to converse or discuss together'. The Latin word was formed by combining two elements: the prefix 'con-' meaning 'together or with' and the verb 'fabulari' meaning 'to speak or tell stories'. This combination literally meant 'to tell stories together' or 'to speak together', which over time developed a more specific meaning of plotting or conspiring in Spanish.

A simpler related Spanish word is 'fábula' (meaning 'fable' or 'story'), which comes from the same Latin root 'fabulari'. While 'fábula' retained the basic meaning of storytelling, 'confabular' evolved to specifically mean discussing or plotting something secretly together.

The English word 'confabulate' is directly related to Spanish 'confabular', both coming from the same Latin source. In English, 'confabulate' has taken on a specialized meaning in psychology, referring to the creation of false memories to fill in gaps in memory. The English word 'fable' is also related, coming from Latin 'fabulari', and maintains the original meaning of 'story' or 'tale'.