the last or most difficult challenge or area of exploration
সবচেয়ে কঠিন বা শেষ চ্যালেঞ্জ বা অনুসন্ধানের ক্ষেত্র
"For many scientists, space remains the final frontier."
"অনেক বিজ্ঞানীর জন্য, মহাকাশ এখনো চূড়ান্ত সীমান্ত।"
to remain calm in difficult or stressful situations
to remember or recall something
not subject to the law; thinking one is untouchable by rules
an attempt to deceive someone into revealing personal or con...
to unite and support each other when facing opposition
to tell many people about something