pulpityoudaoicibaDictYouDict[pulpit 词源字典]
pulpit: [14] Classical Latin pulpitum, a word of unknown origin, denoted ‘platform, stage’. This sense was originally carried over into English (Miles Coverdale, in his 1535 translation of II Chronicles 6:13, wrote ‘Salomon had made a brasen pulpit … upon the same stood he’, where the 1611 Authorized Version was later to have ‘Solomon had made a brasen scaffold … and upon it he stood’).

But it was eventually swamped by a subsidiary sense which emerged in medieval Latin: pulpitum had been applied particularly to platforms on which people stood to speak in public, and in ecclesiastical usage it came to denote a ‘raised structure on which preachers stand’.
[pulpit etymology, pulpit origin, 英语词源]
pulpit (n.)youdaoicibaDictYouDict
early 14c., from Late Latin pulpitum "raised structure on which preachers stand," in classical Latin "scaffold; stage, platform for actors," of unknown origin. Also borrowed in Middle High German as pulpit (German Pult "desk"). Sense of "Christian preachers and ministers generally" is from 1560s. Pulpiteer, old contemptuous term for "professional preacher," is recorded from 1640s.