Exodus 9:17

Hitherto hast thou tyrannized over My people, instead of releasing them.

מסתולל, the reflexive mode of the verb סלל as in סולו סולו דרך הרימו מכשול, “pave, pave a way and remove every obstacle, etc.,” (Isaiah 62,10). Just as the stones are pressed together to remove them as obstacles, so Pharaoh squeezed the Israelites so that they could not offer any resistance. Compare also Jeremiah 34,11 ויכבשום לעבדים ולשפחות, they “compressed” them into becoming male and female slaves. Concerning the grammatical principles underlying the use of the reflexive conjugation mitpael, every time this conjugation appears it has the letter ת preceding the first root letter, except the ones that have that letter at the end instead of at the beginning. Examples of the former are Psalms 94,4 יתאמרו כל פעלי און Words such as יתברך, יתגדל or in Ezekiel 38,23 והתגדלתי והתקדשתי, or Jeremiah 9,23 יתהלל המתהלל, or מתפלל in Exodus 10,2. The author lists a few more examples, showing that all of the letters of the aleph bet except the 7 letters ד'זט ס'ץ ש'ת, follow this pattern. When the first root letter is either a ש or a ת, the letter ת is appended at the end instead of at the beginning. The exception is a word whose root begins with the letter ס. One such example is our verse, the root being סל. The basic meaning is parallel to Numbers 16,13 תסתרר עלינו, where the word תסתורר is derived from the root שר. In examples such as ישתבח, ישתמר or משתכר, all of which have roots beginning with the letter ש, the letter ת signaling the conjugation התפעל is deferred until after the first root letter. In roots commencing with the letter ז or צ, no such letter ת signaling the reflexive conjugation appears at all. Instead, after the letter צ the letter ט is added to show us that we deal with the reflexive conjugation. Well known examples of these constructions are found in Genesis 44,16 נצטדק from the root צדק, and Joshua 9,12 הצטיידנו from the root ציד, provisions. Concerning the words with the first root letter ז, the letter signaling the reflexive conjugation is a ד, as in Daniel 2,9 הזדמנתון. The letters ד-ט-ת, by themselves when they appear at the beginning of the word, do not get an additional letter to indicate that the construction in which they appear is a reflexive conjugation. A prominent example of this is Numbers 7,89 וישמע את הקול מדבר, where the Torah did not write מתדבר. Another such example is Leviticus 21,4 לא יטמא בעל בעמיו, where because the root טמא begins with the letter ט the Torah did not write יתטמא, although the verb is in the reflexive mode, of course. The same is true in Samuel II 22,27 where the word תתפל in the line ועם עקש תתפל, does not have another letter ת at the beginning in order to signal that the verb is in the reflexive mode. [The author illustrated his point with still more examples, but I think he made his point adequately with the examples I have cited. Ed.]