Abiding, Durable, resilient
To indicate a word or phrase is important
F.Why and I would also say D what. For example if you would predict that a pig is pink for example. What: I predict pigs are pink. Why: here you would have a reason.
Answer: past tense endow or provide with a quality or ability.
Explanation: "our sight would be endued with a far greater sharpness"
