The antonyms for the term "am source of strength" are plenty, and they include phrases such as "drain of energy," "weak link," "burden on others," and "cause of despair." These terms describe the opposite sentiment of being a source of strength, indicating that the individual provides no support, reduces energy, adds to difficulties, or creates additional problems. In essence, people who are antithetical of the concept of being a source of strength are often a burden on others, either emotionally or physically. Thus, it is essential to cultivate a positive and supportive attitude towards others to avoid being a negative influence in their lives.