Across
- 4. unable to be affected by
- 5. sluggish and apathetic
- 7. the active immature form of an insect
- 9. entirely lacking or free from
- 10. remove soil or rock; become ground down or deteriorate
Down
- 1. a tentative theory/concept about the natural world not yet verified
- 2. not easily convinced; having doubts or reservations
- 3. any substance or layer lying underneath another
- 6. engaged in, involving, or reflecting deep or serious thought
- 8. mysterious or secret