The term 'A BIT' can be broken down into four separate words, each with three or four letters. OAT is a cereal grain that is often used to make porridge or oatmeal. SOME is an indefinite pronoun that is used to refer to an unspecified amount of something. TAD is an informal word meaning a small amount. IOTA is the smallest letter in the Greek alphabet. Together, these words can be used to describe a small amount of something.