rain

We've been having a lot of rain lately.

The rains came late that year.

This process involves cloud seeding – when various substances are put into clouds in an attempt to cause rain.
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2019, VOA Learning English (public domain)

(meteorology) Condensed water falling from a cloud.

(figuratively) Any matter moving or falling, usually through air, and especially if liquid or otherwise figuratively identifiable with raindrops.

A rain of mortar fire fell on our trenches.

(figuratively) An instance of particles or larger pieces of matter moving or falling through air.

en-noun

rain (usually uncountable, plural rains)

Sranan Tongo: alen

kōpatapata

light rain but falling in large droplets

From Middle English reyn, rein, from Old English reġn, from Proto-West Germanic *regn, from Proto-Germanic *regną (compare West Frisian rein, Dutch regen, German Regen, Danish and Norwegian regn), of uncertain origin. Possibly from pre-Germanic *Hréǵ-no-, from Proto-Indo-European *Hreǵ- (“to flow”) (compare Latin rigō (“wet, soak”), Lithuanian rõki (“drizzling rain”), Albanian rrjedh (“to flow, drip”)), although the consonant reflexes don't match.


rain

Judging by the black cloud, it will rain later today.

(impersonal, meteorology) To have rain fall from the sky.

Tears rained from her eyes.

Leaves rained from the tree.

Bombs rained from the sky.

The rain it raineth every day.

c. 1601–1602 (date written), William Shakespeare, “Twelfe Night, or What You Will”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act V, scene i]:

(intransitive, figuratively) To fall as or like rain.

The boxer rained punches on his opponent's head.

(transitive, figuratively) To issue (something) in large quantities.

en-verb

rain (third-person singular simple present rains, present participle raining, simple past and past participle rained)

rains (present singular third-person)
raining (participle present)
rained (participle past)
rained (past)
rain (infinitive)

piss on someone's leg and tell them it's raining

طاحت الشتا (tāḥit eš-šta, literally “rain fell”)

صبت الشتا (sabbāt eš-šta, literally “rain fell”)

आकाशातून पडणे

ākāśātūn paḍṇe

идти́

usage: дождь идёт (doždʹ idjót, “it's raining”)


rain

Such wondrous science in mans witt to rain.

1590, Edmund Spenser, “Book I, Canto V”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, →OCLC:

rains (present singular third-person)
raining (participle present)
rained (participle past)
rained (past)