The term 'Oh So' can be represented by two crossword solutions, ULTRA (5 letters) and TRES (4 letters). ULTRA is a Latin word meaning 'BEYOND' or 'VERY' and is often used to describe something that is of the highest quality or degree. TRES is a Spanish word meaning 'THREE' and is often used to describe something that is VERY good or excellent. Together, the two words form the phrase 'Oh So', which is used to express admiration or approval.