Where does “unattention” come from?

unattention (English) comes from English attention, from Middle English attencioun, from Latin attentio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

unattention (English): Lack of attention

Definitions

Lack of attention

Ancestry of “unattention”, step by step

unattention traces back through two separate lines of ancestry.

via English attention

Step	Language	Word	Meaning
1	English	attention	Mental focus; An action or remark expressing...
2	Middle English	attencioun	—
3	Latin	attentio	attention, attentiveness
4	Latin	-tiō	tion, -ation, -ing
5	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
6	Latin	dissertus	arranged, disposed; explained
7	Latin	disserere	second-person singular future passive indicative...
8	Latin	dis-	asunder, apart, in two; reversal, removal;...
9	Latin	calceus	shoe
10	Latin	calx	limestone; chalk; the finish line
11	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via English un

Step	Language	Word	Meaning
1	English	un	One

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