Where does “beannacht” come from?

beannacht (Irish) comes from Old Irish bennacht, from Old Irish bendacht, from Latin benedictiō, from Latin Benedictus, from Latin benedīcō, from Latin dīcō, from Latin -tiō, from Latin dissertātiō — small stone, pebble; gravel, rubble.

beannacht (Irish): blessing; benediction

Definitions

blessing; benediction

Ancestry of “beannacht”, step by step

Step	Language	Word	Meaning
1	Old Irish	bennacht	benediction, blessing
2	Old Irish	bendacht	blessing
3	Latin	benedictiō	blessing
4	Latin	Benedictus	Benedict
5	Latin	benedīcō	to speak well of someone, commend
6	Latin	dīcō	to say, talk, speak, utter, mention
7	Latin	-tiō	tion, -ation, -ing
8	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
9	Latin	dissertus	arranged, disposed; explained
10	Latin	disserere	second-person singular future passive indicative...
11	Latin	dis-	asunder, apart, in two; reversal, removal;...
12	Latin	calceus	shoe
13	Latin	calx	limestone; chalk; the finish line
14	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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