Where does “ekstre” come from?

ekstre (Esperanto) comes from Esperanto -e, from Latin -ē, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

ekstre (Esperanto): extraordinarily, as an extra factor; additionally

Definitions

extraordinarily, as an extra factor; additionally

Ancestry of “ekstre”, step by step

Step	Language	Word	Meaning
1	Esperanto	-e	-ly; the ending for correlatives of place
2	Latin	-ē	ly; used to form adverbs from adjectives
3	Latin	dis-	asunder, apart, in two; reversal, removal;...
4	Latin	calceus	shoe
5	Latin	calx	limestone; chalk; the finish line
6	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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