The word "authentication" is a noun that means The process of verifying the identity of a user, device, or entity.. In Bengali, it is expressed as "প্রমাণীকরণ, সত্যতা প্রতিপাদন, স্বীকৃতি", which carries the same essential meaning. For example: "Two-factor authentication adds an extra layer of security.". Understanding "authentication" enhances vocabulary and improves language comprehension for both English and Bengali speakers.