Source: p 130-131, With Good Reason, An Introduction to Informal Fallacies (2000 6 ed) by York U. Prof. S. Morris Engel.
[p 130 :] Identify the fallacy of ambiguity — equivocation, amphiboly, accent, hypostatization, division, or composition — that is committed in, or that could result from, each of the following. Explain the error committed in each case.
[p 131 :] 15. Thou shalt not bear false witness against thy neighbor.
Conjecture: From the textbook's supplied answers to a few exercises for each set (but not to the question above), I am inferring the author to intend only 1 Informal Fallacy for each exercise, selected from only the ones named in the instructions (though I know of the simultaneous occurrence of Informal Fallacies, in general).
Attempt: By the Process of Elimination (because none of the other 5 Fallacies named apply), I would propound 'Accent' because the meaning of 15 can be ambiguated by which word is accented. For example, someone may accent the 2nd-person pronoun 'Thou' or 'Thy' (vs. the impersonal 3rd person 'One' or 'Everyone') to reference specifically the addressee, or the noun 'neighbour' to reference specifically the addressee's neighbour.