You learn that Hebrew roots have three consonants. Then you meet קָם "he got up", which has two. You learn נָפַל "he fell" and then יִפּוֹל "he will fall", where the נ has evaporated. You learn that קָנָה "he bought" is the root ק־נ־ה, and then discover that the ה is never pronounced anywhere.
At this point most learners conclude that Hebrew is full of irregular verbs to be memorised one by one. It is not. Every one of these is a member of a class — a גזרה (gizrá, plural גזרות gzarót, literally "a cut, a section") — and every class is predictable. Between them the gzarot cover a large share of the commonest verbs in the language, which is exactly why beginners hit them immediately.
This page is a map. It names the classes and hands each one to the page that teaches its paradigm; there is not a single conjugation table here on purpose.
First, how the classes are named
Hebrew grammar numbers the three root positions using the letters of the model root פ־ע־ל ("to do"): the first radical sits in the פ position, the second in the ע, the third in the ל.
A class name then says which position holds which weak letter:
- פ״נ (pe-nun) — a root whose first letter is נ
- ל״ה (lámed-hey) — a root whose third letter is ה
- ע״ו (áyin-vav) — a root whose middle letter is ו
The double mark ״ is a gershayim, Hebrew's acronym sign (geresh and gershayim). Read the names aloud by letter name — pe-nun, lámed-hey — as Israelis do.
The classes
| גזרה | What is weak | Roots | What you see | Taught on |
|---|---|---|---|---|
| שלמיםshlemím | nothing — all three letters hold | כ־ת־ב, ש־מ־ר | כָּתַב, שָׁמַר — the default | שלמים |
| פ״נ | initial נ swallowed by the next letter | נ־פ־ל, נ־ת־ן | נָפַל but יִפּוֹל · נָתַן but תֵּן | פ״נ |
| פ״י | initial י disappears in the future and infinitive | י־שׁ־ב, י־ר־ד | יָשַׁב but יֵשֵׁב, לָשֶׁבֶת · יָרַד but לָרֶדֶת | פ״י |
| ע״ו / ע״י | middle ו or י absorbed into a long vowel | ק־ו־ם, ג־ו־ר, שׂ־י־ם | קָם, גָּר, שָׂם — apparently two letters | hollow verbs |
| ל״ה | final ה is a vowel letter, not a consonant | ק־נ־ה, ע־ל־ה, ר־צ־ה | קָנָה but קָנִיתִי | ל״ה |
| ל״א | final א silent; it lengthens the vowel instead | מ־צ־א, ק־ר־א | מָצָא, מָצָאתִי — no shva under the א | ל״א |
| כפוליםkfulím | 2nd and 3rd letters identical, and collapse | ס־ב־ב, ק־ל־ל | סָבִיב, מְסִיבָּה, קַל | כפולים |
| gutturals א ה ח ע (and ר) | refuse a dagesh and a plain shva; bend the vowels | ש־מ־ע, ב־ח־ר | שׁוֹמֵעַ, לִשְׁמוֹעַ, יִבְחַר | gutturals |
A root can belong to two classes at once — י־צ־א is both פ״י and ל״א, ה־י־ה is weak in every position — and those are collected on doubly weak roots. The full paradigms live on the גזרות overview, and the skill of naming a verb's class from its infinitive is drilled on identifying a gizra.
Why a letter goes missing
The weak letters are not a random list. They are exactly the letters that are unstable as consonants in the first place.
נ has no vowel of its own at the start of a word, so when it is squeezed against the next consonant it assimilates into it — the נ of נ־פ־ל does not vanish in יִפּוֹל, it has been absorbed into the dot inside the פ, which is why that פ is p and not f.
ו and י double as vowel letters. When one of them lands in the middle of a root with no vowel of its own, it stops being a consonant and becomes the vowel: ק־ו־ם gives kam with a long a, ש־י־ם gives sam. See ו and י as consonants and vowels.
ה and א at the end of a word have no audible consonantal value in Israeli Hebrew — neither can close a syllable, so ה is written as a plain vowel letter and א simply goes silent, leaving the vowel before it long. That is the subject of א and ע.
Two identical consonants in a row collapse into one with a doubling dot, which unpointed writing does not show.
The diagnostic: the missing letter comes back
Here is the one technique to take away from this page. A radical that disappears from one form almost always resurfaces in another member of the family. When a word looks two-lettered, go looking for the third letter elsewhere.
| Looks like | Root | Where the missing letter reappears |
|---|---|---|
| יִפּוֹל — no נ | נ־פ־ל | נָפַל · נְפִילָה · לִנְפּוֹל |
| קָם — no ו | ק־ו־ם | לָקוּם · מָקוֹם · תְּקוּמָה |
| שָׂם — no י | שׂ־י־ם | לָשִׂים · מֵשִׂים · שִׂימָה |
| קָנָה — the ה is never heard | ק־נ־ה | the ה turns into י: קָנִיתִי · קְנִיָּיה |
| יֵשֵׁב — no י | י־שׁ־ב | יָשַׁב · יְשִׁיבָה |
State it plainly, because textbooks often leave it implicit: Hebrew has no genuine two-letter roots in this system. The dictionary's three-letter citation is not a fiction — the surface form is a reduction of it, and the full root is visible in the rest of the family.
קמתי היום בשש בבוקר.
kámti hayóm beshésh babóker
I got up at six this morning.
אנחנו גרים בחיפה כבר עשר שנים.
anákhnu garím bekhéifa kvar éser shaním
We've been living in Haifa for ten years.
שמתי לך אוכל במקרר.
sámti lekhá ókhel bamekarér
I've put some food in the fridge for you. (to a man)
לא מצאתי את המפתחות בשום מקום.
lo matsáti et hamaftekhót beshúm makóm
I couldn't find the keys anywhere.
That last sentence contains its own lesson: מקום "place" is ק־ו־ם with the ו in plain sight, sitting next to a verb (מצאתי) from the ל״א class. Weak roots are not a corner of the language you can postpone.
הוא ירד מהאוטובוס בתחנה הלא נכונה.
hu yarád meha'otóbus batakhaná haló nekhoná
He got off the bus at the wrong stop.
רצינו לצאת אבל התחיל לרדת גשם.
ratsínu latsét avál hitkhíl larédet géshem
We wanted to go out but it started raining.
תן לי שנייה, אני כבר בא.
ten li shniyá, aní kvar ba
Give me a second, I'm coming. (informal, to a man)
תיזהר, אתה עוד תיפול מהכיסא.
tizahér, atá od tipól mehakisé
Careful — you'll fall off the chair. (informal, to a man)
Israelis are quietly regularising some of this
The gzarot are not frozen. Spoken Israeli Hebrew has been levelling the odder corners for a century, and in several cases the levelled form is now the standard one — so a "mistake" in an old textbook may simply be where the language has arrived.
Long forms have lost. The literary past tense of a hollow verb in הפעיל was הֲקִימוֹתִי "I established" (literary/archaic). Nobody says that; everybody says הֵקַמְתִּי, built on the short stem, and that is the normal form today.
הקמנו את החברה לפני חמש שנים.
hekámnu et hakhevrá lifnéi khamésh shaním
We founded the company five years ago.
The short imperatives are being sidestepped. The genuinely irregular imperatives almost all come from weak roots — קַח, תֵּן, סַע, שֵׁב, רֵד — and rather than learn them, speakers reach for the future tense instead: תיקח, תיתן, תיסע, תשב, תרד. Both are current. The short form is neutral to slightly formal; the future form is ordinary speech and is not an error.
תיקח מונית, יורד גשם בחוץ.
tikákh monít, yoréd géshem bakhúts
Take a taxi — it's raining out. (informal, to a man; קח מונית is the neutral form)
The broader picture, including the forms teachers still correct, is on Israelis regularise.
Common Mistakes
1. Recording a two-letter root. What you see on the surface is not what the dictionary stores.
❌ ק־ם
Incorrect — קם is a hollow verb whose middle ו is absorbed into the vowel. The root is ק־ו־ם, as מקום and לקום show.
✅ תמיד קשה למצוא מקום חנייה ברחוב הזה.
tamíd kashé limtsó mekóm khaniyá barekhóv hazé
It's always hard to find a parking space on this street.
2. Putting the נ back in. Once you know the root is נ־פ־ל, it is tempting to insist on the נ in every form.
❌ אני מפחד שאני אנפול
Incorrect — in the future the נ assimilates into the next letter: אני מפחד שאני אפול.
✅ אני מפחד שאני אפול.
aní mefakhéd she'aní epól
I'm afraid I'll fall. (male speaker)
3. Conjugating a ל״ה verb as if the ה were a consonant. It never is — it is replaced by a י before any ending.
❌ קנהתי לה מתנה
Incorrect — the ה of קנה is a vowel letter and gives way to a י: קניתי לה מתנה.
✅ קניתי לה מתנה ליום ההולדת.
kaníti la mataná leyóm hahulédet
I bought her a present for her birthday.
4. Treating a ל״א verb like a ל״ה verb. The א is silent, but unlike the ה it stays put and is written in every form.
❌ מצתי עבודה חדשה
Incorrect — the א of מצא is silent but never dropped: מצאתי עבודה חדשה.
✅ מצאתי עבודה חדשה, מתחיל בראשון.
matsáti avodá khadashá, matkhíl barishón
I've found a new job — I start on Sunday. (male speaker)
Key Takeaways
- A גזרה is a root class, not a list of exceptions. קם, גר, נפל, קנה and מצא are members of large, fully predictable groups.
- Classes are named by position: פ, ע and ל stand for the first, second and third radical, after the model root פ־ע־ל. Hence פ״נ, פ״י, ע״ו, ל״ה, ל״א.
- The eight classes worth knowing by name: שלמים, פ״נ, פ״י, ע״ו/ע״י, ל״ה, ל״א, כפולים and the gutturals.
- A letter goes missing for a phonetic reason: נ assimilates, ו and י turn into vowels, final ה and א have no consonantal value, identical letters collapse.
- The diagnostic: the missing letter reappears elsewhere in the family — נפילה restores the נ, מקום restores the ו, קניתי restores the ל״ה root's י.
- Hebrew has no two-letter roots in this system. The surface form is reduced; the citation form is the truth.
- Spoken Israeli Hebrew is still levelling these classes — הקמתי over הקימותי, תיקח over קח — so what an old grammar calls an error is often just the next stage of the language.
Now practice Hebrew
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Start learning Hebrew →Related Topics
- The גזרות: Root Classes That Reshape a ParadigmA2 — A גזרה is a class of roots that all deform the paradigm in the same predictable way. Here is how the classes are named, what each one does to a pa'al verb, why pa'al suffers most — and why the first twenty verbs you need are almost all weak ones.
- Identifying a Verb's גזרה from Its InfinitiveB1 — An ordered procedure that turns any Hebrew infinitive into a root, a binyan and a גזרה — the front of the word gives you the binyan, what is left gives you the class. Eight worked examples, the reverse skill, and the lookup habit that makes Hebrew dictionaries appear to be missing half the language.
- Pa'al ע״ו Hollow Verbs: קם, גר, בא, טסB1 — Roots whose middle letter is ו lose it entirely — you hear two consonants, never three. The past is stressed on the stem and the future is built on a long u, which together produce the most useful stress contrast a Hebrew learner will meet: bá'a 'she came' against ba'á 'she comes'.
- Gutturals (א ה ח ע ר) and What They Do to a PatternB1 — The gutturals are not a list of exceptions to memorise — they are one conspiracy with three heads. Each of these letters refuses something an ordinary consonant does, and every irregular form you will meet is the pattern rearranging itself around that refusal.