Part of speech that joins two propositions to form a complex sentence. This part of the speech allows sentences to be joined together to form cause/effect chains and creates various relationships between sentences, such as consequences, conditions, clarifications, and so on. For example, if I say, 'oggi ho la febbre e INFATTI ho la temperatura alta'. This word 'infatti' proves that I have a fever through temperature! Or if I say, 'non voglio lavorare perché sono stanco'. I indicate as 'effect' that I don't want to work and as 'cause' my tiredness