Convenient: (مريح / ملائم) Fitting in well with a person’s needs or plans.
Captivity: (الأسر / الحبس) The condition of being imprisoned or confined (often used for animals in zoos).
Ethical: (أخلاقي) Relating to moral principles or the branch of knowledge dealing with these.
Fulfillment: (الرضا / الإشباع الذاتي) A feeling of satisfaction at having achieved your desires.