What is the origin and meaning of “be-,” as in bedraggled, bewitched, beatitude?
From Merriam-Webster:
Main Entry: be-
Function: prefix
Etymology: Middle English, from Old English bi-, be-; akin to Old English bI by, near – more at BY
1 : on : around : over <bedaub> <besmear>
2 : to a great or greater degree : thoroughly <befuddle> <berate>
3 : excessively : ostentatiously – in intensive verbs formed from simple verbs <bedeck> and in adjectives based on adjectives ending in -ed <beribboned>
4 : about : to : at : upon : against : across <bestride> <bespeak>
5 : make : cause to be : treat as <belittle> <befool> <befriend>
6 : call or dub especially excessively <bedoctor>
7 : affect, afflict, treat, provide, or cover with especially excessively <bedevil> <befog>
Thanks! 
I don’t think “beatitude” falls in that category.