To cover or treat with ohms; likely a technical or humorous neologism combining be- with ohm (a unit of electrical resistance).
Be- + ohm (named after Georg Simon Ohm, 19th-century physicist). Likely a modern scientific coinage or playful formation rather than historical English.
If 'begohm' ever existed as a scientific joke, it shows that the productive 'be-' prefix never really died—modern English speakers can still create these formations humorously, like how 'befuddle' and 'bedazzle' are both old and new examples of the pattern.
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