Does a jury need to be instructed on the meaning of words "commonly understood by those familiar with the English language"?

Appellant does not dispute that a jury need not be instructed on the meaning of words "commonly understood by those familiar with the English language." (People v. Anderson (1966) 64 Cal.2d 633, 639-640.) His contention is that, insofar as it appears in the definition of elder abuse as conduct "likely to produce great bodily injury or death," the word "likely" has a technical or legal meaning that differs from its nonlegal or common meaning, and that the technical or legal meaning is not "commonly understood by those familiar with the English language."