ציטירנדיקער פּירוש אויף ויקרא 20:4

with a stone We might think that this is a collective noun, as in “I have ox and donkey” [Genesis 32:6]; however, the words of the tradition [Sanhedrin 45a] are true.

The connotation is rising up. The מ"ם of this word is grammatical and indicates the plural. It is not an expression of concealment as in (Eicha 3:56), “Do not conceal (תעלם) Your ear,” in which case it would be explained like (verse 59), “Adonoy will strike you with prodigious (והפלא) blows,” i.e., they will be separate and hidden from every living thing, because if so, it should have been punctuated with a shva under the עי"ן as in the verse “Do not conceal (תעלם) Your ear,” and “will hide their eyes” (העלם יעלימו) (Vayikra 20:4). Furthermore, it should have said יעלימם ה' עליך, since it is referring to the plagues. (Re”m). This is difficult to understand because in all the texts יעלם is punctuated with a shva like העלם יעלימו which is also punctuated with a shva. Therefore we must say that Rashi does not differentiate between whether it is punctuated with a shva or a chataf shva, and his main proof is that it should have written יעלימם. Alternatively, his proof is that if it was an expression of concealment, the phrase [following] “against you” would not be understandable.