1. no, these lines are parallel: || , they can’t run into each other if they are side by side
2. Altered typically mean a change in a character, which means Lauren treated her sister badly before.
3. To strive means to make an effort and to work hard for something, he should practice once a week
4. Dispelled is the past tense of dispel, to make a feeling or something go away, the easy thoughts were not reinforced, they went away.
5. Earnest means sincere or serious, Claire was earnest.
6. Indefinite means something can go on forever, in this sentence it means Juan was a lot better at swimming