Where does “द्विसदनीयता” come from?

द्विसदनीयता (Hindi) comes from Hindi ता, from Classical Persian تا.

द्विसदनीयता (Hindi): bicameralism

Definitions

Step	Language	Word	Meaning
1	Hindi	ता	until
2	Classical Persian	تا	—

द्विसदनीयता — Etymology, Origin & Word History | Etymology Explorer