Prepositions of Direction are fundamental parts of the Welsh grammar system. These are small words that indicate direction or movement and can change the entire meaning of a sentence. In Welsh, there are several prepositions that express the direction, such as ‘i’ (to), ‘o’ (from), ‘ar’ (on), ‘yn’ (in), and ‘at’ (at). These prepositions are often used in daily conversations, making it important to understand and use them correctly.