rain: water falling from the sky, from a passing shower to a drenching storm
This is the plain word for rain: water falling from the sky, whatever its strength. Older reference works claimed it meant heavy rain in particular, but that claim has not held up. When the text wants weight, it adds a describing word, calling it a "great" rain or a "flooding" rain. Left on its own it simply means rain. It overlaps almost completely with the older Hebrew word for rain (מָטָר), so closely that poetry can stack the two together for emphasis, as Job 37:6 and Zechariah 10:1 do. Over the centuries this word won out, and by the time of the rabbis it was the ordinary Hebrew word for rain.
Rain mattered enormously. Israel farmed hill country with no great river to draw on, so the whole year turned on when the sky opened:
- the autumn rain that softened baked ground for plowing (יוֹרֶה)
- the heavy winter rains that filled the wells and cisterns
- the spring rain that swelled the grain just before harvest (מַלְקוֹשׁ)
One failed season could ruin a year, which is why rain turns up constantly in promises, in warnings, and in prayers.
So the Bible treats rain as something given rather than something that merely happens. God sends it in its season as a sign of favor, and holds it back as a warning. That is also what makes the contest on Mount Carmel so pointed: Baal was advertised as the god who brings the rain, and the story ends with Elijah hearing the sound of a rain Baal could not produce.
The same rain can arrive as a weapon. Ezekiel's picture of a flooding rain that beats a badly built wall to the ground, the hail and downpour promised against Gog, and the forty days of the flood all use this ordinary word for something devastating. The word itself does not shift: it is always just rain. What changes is whether it comes as gift, is withheld, or crashes down as judgment.
Nuances
Disputed
Whether גֶּשֶׁם denotes heavy rain specifically or is broadly synonymous with מָטָר, the general term for rain.
- majorityThe two lexemes are broadly synonymous; intensity is supplied by qualifiers such as גָּדוֹל (1 Kings 18:45) and שׁוֹטֵף (Ezekiel 13:11, 13; 38:22), and the two nouns are stacked in Job 37:6 and Zechariah 10:1 as a poetic intensification, which tells against a fixed contrast.; BDB, s.v. גֶּשֶׁם, 177; D. J. A. Clines, ed., The Dictionary of Classical Hebrew, 2:372-73; H.-J. Zobel, "מָטָר, גֶּשֶׁם," TDOT 8:250-65; C. Barth, "מָטָר," TLOT 2:663-65
- minorityThe noun itself denotes heavy rain or a downpour, as distinct from ordinary rainfall.; HALOT (Koehler-Baumgartner-Stamm, trans. Richardson), 1:205; R. Meyer and H. Donner, eds., Wilhelm Gesenius Hebräisches und aramäisches Handwörterbuch, 18th ed., s.v. גֶּשֶׁם