1. The suffix "-er" in English typically denotes "a person who does something" or "an owner of something."2. For instance, adding "-er" to "write" results in "writer," to "teach" in "teacher," and to "own" in "owner."3. In English, the "-er" suffix can be applied to various types of words, making it very common in the language.4. Besides indicating "a person who does something" or "an owner of something," the "-er" suffix can also be used to denote abstract concepts.5. For example, "slow" becomes "slower" with the addition of "-er," expressing an abstract idea.6. Additionally, the "-er" suffix can be used to form the comparative degree of verbs.7. For instance, "run" becomes "runner" with the addition of "-er."8. To master the "-er" suffix effectively, frequent practice is key.9. When encountering a new word, try to relate it to "a person who does something" or "an owner of something," which helps in understanding the word's meaning.10. Memorizing some common words with the "-er" suffix can aid in recalling its usage, such as "writer," "teacher," and "owner."11. However, it's important to remember that the "-er" suffix is not applicable in all situations; sometimes, it may not accurately describe a specific person or thing. Therefore, its use should be based on an understanding of the word's basic meaning.