The prefix be means thoroughly; intensive

Word	Meaning
Befuddle	Confuse thoroughly
Beguile	Mislead or delude; cheat
Behoove	To be necessary or proper; be suited to; be incumbent upon
Belabor	Explain or go over excessively or to a ridiculous degree
Beleaguer	Besiege or attack; harass
Bemused	Confused; lost in thought
Berate	Scold strongly
Bereavement	State of being deprived of something valuable or beloved
Beset	Harass or trouble
Besmirch	To make filthy; soil; defile
Bestow	To give; to grant as; confer
Betoken	Signify; indicate
Betroth	Become engaged or married