When searching for a high-quality "Eng Ben" dictionary, ensure it includes:

Seeing the word in context is the best way to learn its actual usage.

This digital library hosts many out-of-print and classic dictionaries like the Samsad English-Bengali Dictionary .

If you are looking for a legitimate and free PDF, consider these sources:

You can study or translate even without an internet connection.

While often for preview, some older, public-domain dictionaries are available for full download. A Quick Tip for Learners

It should identify if a word is a noun, verb, adjective, etc.

These help in expanding your vocabulary quickly. Where to Find Reliable Downloads