Final answer:
The appropriate word to complete the sentence with context is 'boast', which should be spelled correctly and fit the meaning of someone confidently declaring their strength.
Step-by-step explanation:
To complete the sentence with the appropriate word from the spelling list, you should consider both the context of the sentence and the correct spelling of the words available. The sentence reads: I don't mean to _____ but I am the strongest person in the whole world. The blank should be filled with a word that means to speak or claim oneself confidently, often interrupting. The word that fits this context is 'boast'.
When selecting a word to fill in a blank, it's important to ask yourself: 1. Am I sure this is the right word to express my idea? and 2. To the best of my knowledge, did I spell it correctly? Applying these questions will help ensure that your choice is appropriate both in meaning and in spelling. In this case, 'boast' is spelled correctly and suitably conveys the idea of confidently declaring oneself as the strongest.