Question

Why will we use some words starting with ''en'' : such as ''en-dangered , encloser ,en-developed, enclaved........etc ., What's the necessity of using ''en'' can't we write the word normally?/

Answer 1

'en' is a prefix also. In the word encode en is a prefix. But in the word envelope, en is not a prefix.
As a prefix 'en' menas- to put into the thing or condition mentioned.

Example- endanger means to put into the category of danger. Enlarge means make larger.