Middle English behoven, from Old English behOfian, from behOf
transitive verb : to be necessary, proper, or advantageous for
intransitive verb : to be necessary, fit, or proper
I wonder if German has a variation of this word, since Old English sounds similar. I don't know German well enough to be able to pluck it off the top of my head. All I know is while people, especially Americans, are speaking in a straightforward style, the use of this word is like a stuffy anachronism.