cloud-seeding

The term is a modern compound, formed in the mid-20th century to describe the then-novel weather modification technique. It is built entirely from native English roots: 'cloud' originates from an Old English word for a mass or hill, which semantically evolved to describe the sky-borne formations. 'Seeding' derives from the agricultural practice of sowing seeds into the ground. The compound's logic is a direct metaphorical extension: just as one sows seeds into soil to grow crops, one "sows" chemical agents into clouds to "grow" precipitation. This transparent, analogical construction makes the technical process conceptually accessible.

Structure: cloud (visible mass of condensed water vapor) + seeding (sowing or introducing something) - cloud: From Old English 'clūd', meaning "mass of rock, hill"; later shifting to "mass of condensed water vapor" in Middle English. In this compound, it functions as the direct object/target of the action. - seeding: From the verb 'seed', derived from Old English 'sǣd' (noun: seed) and 'sǣdan' (verb: to sow). In this compound, the gerund form 'seeding' functions as the action of introducing or dispersing agents.