The idiom "at one's fingertips" means-

• The idiom "at one's fingertips" means- Instantly or readily available.• at one's fingertips- English Meaning: instantly or readily available; convenient and easy to find.- Bangla Meaning: নখদর্পণে।• Ex. Sentence: She had all the facts at her fingertips.- Bangla Meaning: সমস্ত তথ্য তার নখদর্পণে ছিল।Source:1. Cambridge Dictionary.2. Website Lecture.