Modern Coinages Built on סמיכות (מד־חום, רב־קומות)

Hebrew's answer to English multi-, bi-, mono-, sub-, super-, inter- and non- is a set of short elements bound to the next word with a maqaf: מַד־חוֹם, רַב־קוֹמוֹת, דּוּ־שִׂיחַ, חַד־פַּעֲמִי, תַּת־מוּדָע, עַל־קוֹלִי, אִי־שִׁוְויוֹן, בֵּין־לְאוּמִי. They are built out of the construct chain and they are the main engine of modern technical vocabulary — but they have drifted far enough from a chain that treating them as one will mislead you about how they inflect and where the article goes.

The eight productive elements

Why this is not quite a construct chain

Three properties separate the family from an ordinary chain.

The first element is bound. It is worth being precise here, because the obvious way to state it is false: several of these elements are perfectly good independent words — רַב is a rabbi and an adjective meaning "many", חַד is "sharp", עַל and בֵּין are the prepositions "on" and "between", אִי is an island. What they cannot do is stand alone in the sense they carry inside the compound: רַב is available as a free word, but you cannot say הַבִּנְיָין רַב and be understood to mean that the building has many floors. In these combinations they are bound prefixoids, and that is what makes the pattern behave more like affixation than like a chain.

The second member is often an adjective. A construct chain takes a noun in its second slot — even the chains Hebrew uses as adjectives do: טוֹב לֵב "good-hearted" is literally good of heart, לֵב is a noun, and the phrase marks its article inside like any other chain (הָאִישׁ טוֹב הַלֵּב). But רַב־לְשׁוֹנִי, חַד־פַּעֲמִי, תַּת־קַרְקָעִי, דּוּ־קוֹמָתִי and בֵּין־לְאוּמִי end in an adjective — לְשׁוֹנִי, פַּעֲמִי and קַרְקָעִי are not nouns at all — and the compound is then an adjective built out of an adjective, which no chain is.

The article goes on the front. This is the diagnostic that settles it. A chain is made definite on its last noun (בית הספר), whereas one of these adjectival compounds takes ה at the very front, exactly like any other adjective: הַהַצָּעָה הַחַד־פַּעֲמִית, הַכֶּנֶס הַבֵּין־לְאוּמִי. Nothing about the second element is marked at all.

Where the plural lands, and why it splits

The family divides on this, and the split is informative. Where the first element does a head noun's job, the plural lands on it, exactly as in a chain: רַב־מֶכֶר gives רַבֵּי־מֶכֶר, and a row of tower blocks is בִּנְיָינִים רַבֵּי־קוֹמוֹת. Where it is a negator or a scale marker, it has nothing to pluralise and the ending goes on the base: אִי־הֲבָנָה gives אִי־הֲבָנוֹת, תַּת־קְבוּצָה gives תַּת־קְבוּצוֹת. Definiteness splits the same way — אִי־ is transparent to the article, which lands on the noun behind it (אִי־הַשִּׁוְויוֹן), while an adjectival compound takes it at the front.

The maqaf, and how often it is actually written

The joiner is the maqaf ־ (U+05BE), Hebrew's own hyphen, and it is what the Academy prescribes across this whole series. It is not the Latin hyphen, which sits at mid-height and is bidirectionally neutral; the mark, its mechanics and the compounds that have fused solid instead (בֵּין־לְאוּמִי is very often written בינלאומי) are on the מקף and hyphenated prefixes.

What is worth knowing beyond the rule is how unevenly it is observed — and that observance varies by word, not by principle. Measured on Hebrew Wikipedia with insource: regex queries on 17 August 2026, each pair probed in an identical shape (a leading space, no trailing terminator, so both columns catch the same inflections):

Eight sampled hits of the spaced חד פעמי are all the construction, so that figure is not an artefact. The practical reading is a two-sided one: write the maqaf, because it is the prescribed form and is never wrong in any register — and do not read a spaced spelling as an error, because for some of these words it is the majority spelling. The exception where a space really does change the meaning is אִי־, since אִי alone is the noun "island".

The Academy's coining tool, with an honest success rate

This is how the Academy of the Hebrew Language builds technical vocabulary — a committee needing a word for a new instrument reaches for מַד־ and is done. What varies wildly is uptake. Some coinages are so naturalised that no speaker experiences them as coinages at all: חַד־פַּעֲמִי, רַב־קוֹמוֹת, דּוּ־שִׂיחַ, בֵּין־לְאוּמִי, אִי־שִׁוְויוֹן, תַּת־מוּדָע. Others never left the register they were minted for — עַל־קוֹלִי is technical prose (academic).

The pattern does not have a monopoly even where it succeeded. Beside רַב־קוֹמוֹת, Hebrew builds the same sense on the full participle מְרוּבֶּה — a free word, so the phrase takes no maqaf and inflects on both halves: בִּנְיָינִים מְרוּבֵּי קוֹמוֹת. The bound version is the commoner of the two by roughly an order of magnitude (Hebrew Wikipedia, insource: regex with a leading space, the same shape as the table above, 17–20 August 2026: רבי קומות 191–221 across runs, against 13–16 for מרובי קומות). The Academy's wider record is on Academy coinages.

Common Mistakes

1. Typing the Latin hyphen. It is on the keyboard and the maqaf is not, so this is the default outcome rather than a slip.

2. Marking definiteness inside the compound. These look like construct chains, so the article gets put where a chain puts it — on the second element.

3. Inflecting the bound element. You know Hebrew agreement runs through the whole phrase, so the first half gets a feminine ending too.

4. Pluralising a noun compound at the wrong end. The compound looks like one word, so the plural goes where a plural normally goes.

Key Takeaways

• Eight elements carry the pattern: מַד־, רַב־, דּוּ־, חַד־, תַּת־, עַל־, אִי־, בֵּין־, each bound to the next word with a maqaf.
• The accurate description is not "these are not words" — רַב, חַד, עַל, בֵּין and אִי all exist independently. It is that they cannot stand alone in the sense they carry here, which makes them bound prefixoids rather than members of a chain.
• The second member is frequently an adjective (חַד־פַּעֲמִי, תַּת־קַרְקָעִי, בֵּין־לְאוּמִי), which no construct chain permits — even a chain that works as an adjective (טוֹב לֵב) still ends in a noun.
• The article goes on the front — הַהַצָּעָה הַחַד־פַּעֲמִית, הַכֶּנֶס הַבֵּין־לְאוּמִי — not on the second element the way a chain marks it.
• The plural splits by what the first element is doing: רַבֵּי־מֶכֶר and בִּנְיָינִים רַבֵּי־קוֹמוֹת take it on the first element, אִי־הֲבָנוֹת and תַּת־קְבוּצוֹת take it at the end.
• The maqaf is the prescribed joiner, and observance is uneven word by word: Hebrew Wikipedia has חד פעמי spaced at least 1,300 times against 116 with a maqaf, while תת־קרקעי runs 137 against 33 the other way. Write the maqaf; do not correct a spaced spelling you meet.
• Uptake of the coinages themselves varies too — חַד־פַּעֲמִי and רַב־קוֹמוֹת are ordinary Hebrew, עַל־קוֹלִי stayed technical, and the free-word rival בִּנְיָינִים מְרוּבֵּי קוֹמוֹת lives alongside רַבֵּי־קוֹמוֹת at about a tenth of its frequency.