what does Engirth mean?

Found in the poem I Sing the Body Electric by Walt Whitman, anecdotal sources suggest that 'engirth' means ’to surround’, or ’to wrap’, variant spelling of "engird" which means to ‘encompass’. Engird was first used in 1566.

But the problem is even the oldest dictionaries online don't have an entry for "engirth".

It's often the case that even though a person is genuinely interested in vocabulary improvement, following the wrong steps can prove rather detrimental to their efforts. One common mistake people make is not using their dictionary and other references correctly.

Here are some tips on how to use the dictionary correctly shared by Ezschool.com.