Where does “extenso” come from?

extenso (Portuguese) comes from Latin extēnsus, from Latin extendō, from Latin tendō, from Ancient Greek τένων, from Proto-Indo-European ten- — to stretch, to extend.

extenso (Portuguese): extensive

Definitions

extensive

Ancestry of “extenso”, step by step

Step	Language	Word	Meaning
1	Latin	extēnsus	—
2	Latin	extendō	to stretch or thrust out
3	Latin	tendō	to stretch, stretch out, distend, extend
4	Ancient Greek	τένων	tendon, sinew
5	Proto-Indo-European	ten-	to stretch, to extend

Every word from Proto-Indo-European ten- →Every word from Ancient Greek τένων →Every word from Latin tendō →