Broadcast
来自Big Physics
mid 18th century (in the sense ‘sown by scattering’): from broad + the past participle of cast1. Senses relating to radio and television date from the early 20th century.
wiktionary
broad + cast.
etymonline
broadcast (adj.)
1767, "dispersed upon the ground by hand," in reference to seed, from broad (adj.) + past participle of cast (v.). Figurative sense "widely spread" is recorded by 1785. As an adverb from 1832. Modern media use began with radio (1922, adjective and noun). As a verb, recorded from 1813 in an agricultural sense, 1829 in a figurative sense, 1921 in reference to radio.
