Synesthesia means “sensing together” and it describes the phenomenon of one our senses triggering another; such as sound and color. This isn’t something farfetched; we come across this idea every single day. The English language is filled with synesthetic idioms. Loud colors, frozen silence, bitter cold, sharp cheese, feeling blue and seeing red are just a few examples. We understand these figures of speech instantaneously without realizing that on the surface, they’re rather odd mixtures of our five senses.