Where does “preacheth” come from?

preacheth (English) comes from English preach, from Middle English prechen, from Old French prëechier, from Latin praedicō, from Latin dīcō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

preacheth (English): third-person singular simple present indicative...

Definitions

third-person singular simple present indicative...

Ancestry of “preacheth”, step by step

Step	Language	Word	Meaning
1	English	preach	To give a sermon; To proclaim by public...
2	Middle English	prechen	to preach
3	Old French	prëechier	—
4	Latin	praedicō	to proclaim, declare publicly
5	Latin	dīcō	to say, talk, speak, utter, mention
6	Latin	-tiō	tion, -ation, -ing
7	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →