לצאת

(י"ט:א)
בַּחדֶשׁ הַשְּׁלִישִׁי לְצֵאת בְּנֵי-יִשְׂרָאֵל

It was early on a שבועות morning when, after staying up all night, I needed to be alert enough to correct the בעל קריאה when he pronounced the above bolded word לָצֵאת. In its correct form, the word means "to (since) the exit of," but as it was mispronounced, it is simply the infinitive, to exit.

This surely seems to be a change in meaning. However, even the word itself seems to change meaning, if the context of the word implies the proper meaning, this may render the mistake forgivable. In our case, there seems to be no logical understanding of the pasuk with the word לָצֵאת. Perhaps, then, this mistake is not as grave as it seems. [However, I would still correct it on the spot.]



Furthermore, commenter Elie points out the following:
מה תאמרו על תחילת הפטרת בוא
לָבוא נבוכדראצר וגו'
וזה ברור שהוא כמו כאן לצאת 
אע"פ שמנוקד בקמץ
That being said, we do find the word with the same meaning with a פתח under the ל. So perhaps even the meaning does not change.