أن يقع التعليل بحكم شرعي لا لأمر لغوي
The rationale must relate to a legal ruling, not merely a linguistic resemblance.
An intoxicating quality may be legally relevant to a prohibition. That does not, by itself, establish that Arabic usage assigns every intoxicating substance the same particular lexical name.
Likewise, theft rulings depend on relevant conditions; describing someone as having taken property secretly does not automatically decide every legal classification.
Extending a legal ruling by an effective legal cause differs from changing the conventional meaning of a word by analogy.